(Seungjae is taking an afternoon nap.) (Jiyong is calling somewhere.) How far off are you? Are you near here? Okay. I got it. Is someone visiting? (Who is here to see Seungjae today?) - Thanks for coming. / - Don't mention it. - Have you been well? / - Of course. (Who visited Seungjae's place?) - Is Seungjae asleep? / - Who is it? (Is it god's Son Hoyoung?) (A few days ago) I wish you were a bit fairer, Dad. Am I an unfair person? I wish you were warmhearted, Dad. You want me to be warmhearted? - Yes. / - Me? People close to me said that I was too brusque with Seungjae. That's not how I truly feel. I'm not the best at expressing myself. I invited the most kindhearted person ever to learn from him. I'm looking to get help. Hello. I'm Seungjae's uncle and a long-time friend of Jiyong. I'm Son Hoyoung. Nice to see you. (He is the original king of childcare.) He's really the original. He helped raise Jaemin - 18 years ago. / - He called him "mom". Hoyoung the mom. Will Jiyong be able to learn from Hoyoung? ("The Father Inside") "The Father Inside". Jiyong has become a much warmer person. (Jiyong has become a very warm person.) I've watched a few episodes. He's too smart. He won't fall for this. That's what I think too. - He won't fall for it. / - Something is... We went to Gangwon Province yesterday. We seasoned Gangwon cabbages to make kimchi. Then we enjoyed some Korean beef. Here's a little secret. When Seungjae woke up briefly in the middle of the night, we went to the convenience store to buy him some candy. (He snuck out to buy Seungjae candy.) My wife doesn't know. It's our little secret. Does she not watch the show? Well... (The whole country knows now.) Hold on a bit. I don't even know the layout of the house. (He walks in with the same clothes.) It's the same outfit. It's sky blue. - This is crazy. / - It's the same color. You prepared it in sky blue? I don't feel confident about this. But let's give it a try. ("Father Inside" begins.) - Seungjae is so smart. / - Right? He might just kick Hoyoung out. - That's possible. / - "Excuse me," "but you're in the wrong house." That's true. He's very sharp. He woke up. (How will he react?) Dad. Hi, Seungjae. Come here. (Assessing the situation) It's me. (Who are you?) You're not my dad. - I am. / - He won't have it. Why? Come here. Come to me. - He's running away. / - He's stepping back. You can't recognize me? You can't recognize me? Come check then. See if I'm your dad or not. (He stares at Hoyoung very intently.) (He seems very familiar.) What's wrong? You seem like Lohee's dad. Whose dad? - Lohee's dad. / - Lohee's dad? Who is that? I'm your dad. Is he mistaking him - for Taeyoung? / - I think so. He's back in his room. This won't work. This is Lohee. This is Lohee? Right. It's Lohee. See? I'm right here. (He points at Jiyong.) - Your hair got weird. / - Did it? My face changes once a year. But you've never seen it because I was at work. I think my dad is in the basement. (Seungjae is getting suspicious.) (Getting startled) Will he get caught again? (Seungjae goes looking for his dad.) (He is nowhere to be seen.) He's not around. He's really not here. Goodness. I knew he'd check, so I didn't hide there. - He improved. / - Was he down there? I'm sure he's upstairs. He's checking upstairs because I wasn't there. Oh, no. He's not here either. (Gosh, did Dad's face really change?) After checking upstairs and the basement, is Seungjae starting to believe him? Open your mouth. Is he trying to check his breath? (A while ago, they made a dinosaur snow globe.) (Blowing) (He covers his mouth while frowning.) - Goodness. / - Open your mouth. (His breath must smell if he's my dad.) (Seungjae, the expert in distinguishing breath) (Why does he want me to open my mouth?) Your mouth is black. (But it doesn't smell.) My mouth is black? I really don't think you're my dad. You don't think so? You and I had meat yesterday. Right? Didn't we eat meat? I know a secret your mother can't know. What is it? Remember going to the store late at night? - Just now... / - We went out without her. - His eyes popped. / - Right? Should we call Mom? I'm going to tell her that you don't believe me. Look. I'm really calling your mom. Look. Don't call her honey. Do you call her honey? I don't call her honey. I call her by her name. I'm shy. I can't call her honey. - Call her Yangim. / - We haven't even met. Yes, just call her by her name. Okay. Hello? - Yangim. / - Hello. - There you go. / - Yangim. Yangim. - Yes? / - Yangim. Seungjae doesn't believe me. Talk to him. Sure. Ask her what happened to me. - Mom. / - Hey, Seungjae. Dad's face is weird. Seungjae, you didn't know? Dad's face changes once a year. You didn't know because he was at work then. It's today. Mom, did your face change too? Are you worried that my face has changed too? - Yes. / - My face is the same. Don't worry. Have fun with Dad, okay? Right? You heard Mom, right? Fine, we'll have fun. Gosh, I think he's starting to believe that. - Right. / - You are my dad. - Right? / - He's not doubtful now. A phone call with her made him believe that? You are my dad. - Right? I'm your dad. / - Yes. Let's eat something tasty and have fun today. Okay. - All right. / - Up until last week, I thought he was a genius. - Shall we eat now? / - Yes. - He's a kid after all. / - He's still a kid. - Right. / - He's so innocent. Yes, let's make shapes. Let's make pretty shapes and eat them. Okay. Don't we need a plate to put underneath? Should we get a big plate or a flat plate? A flat plate? A big, flat plate. Where are the plates? A big, flat plate. - Where is it? / - What if he finds out? I don't remember. Where is it? Where is a big, flat plate? - Oh, no. He's doubting. / - He's slightly doubtful. A big, flat plate. He should've said his memory gets lost too. - You're not my dad. / - There it is. I found it. - He found it. / - No, I'm your dad. Yes, you are. - Let's use a big plate. / - A big plate? (I almost ruined it.) You are my dad indeed. - Right. / - Gosh. - Yes, it's ham. / - Do you like ham? - Let's spread the jam. / - Spread the jam first? Do you want a lot? Or is this enough? - Yes. / - Okay. And then we can use the molds for the shapes. Gosh, Seungjae. You're great. Which shape will you make? For me... (He's the most affectionate.) Should I use the heart since I love you? (He can't believe his ears.) He has no kids, but he's good at that. (Hey!) (Jiyong is known as the standoffish dad.) (He's not affectionate when he calls Seungjae.) A heart shape since he loves Seungjae? (I should learn, but it won't stick.) (Sounding affectionate) During every step of the process, - he's communicating. / - Right. - Press it hard. / - That's different. Seungjae gets excited because he's reactive. We made two already. Try this too. - He's feeding Hoyoung. / - Goodness. Seriously. Seungjae, yours is tasty too. I want some water, please. Do you want some water? Okay. He's going to the kitchen again. (He's worried.) Here's my cup! (He points at a rack with many cups.) - That's my cup. / - The plastic one. - That's my cup. / - This one? - Yes. / - That's right. - Yes. The blue one. / - I was right. - The blue is helping him. / - Please give me a lot. - Do you like blue? / - His group color is blue. I knew it. (Blue is the best color.) I'm going to try yours, Dad. Sure. Go ahead. Take a bite. It's delicious. Is it delicious? Your sandwich is better than Mom's. Is that so? Gosh, isn't that the best compliment? Seungjae, earlier, I told you I brought a friend you like. Do you want to see your friend? (A friend?) - Stay here and eat. / - Okay. I'll bring your friend. Wait here. (Getting curious) I wonder what Dad will bring. All right. Let's go inside. - Goodness. / - He brought a puppy. Seungjae is going to be over the moon. Seungjae, your friend is here. (That's a puppy.) - Your friend is here. / - Gosh, he's liking it. - Come here. / - It's a puppy. Your friend is here. - The puppy is fat. / - Right. Come down, and play with the puppy. Dad, what's the puppy's name? - Its name is Ogoo. / - Ogoo? Ogoo. Ogoo. (Ogoo has many special talents.) Ogoo. You can pet the pup. There you go. - This is Ogoo. / - I want to hug Ogoo. Go ahead. - He wanted to raise pets. / - Ogoo is heavy. There you go. - He's heavy. Right? / - I'm allergic. Jiyong is allergic to dogs. Ogoo is peeing. Look. He's peeing. - It has a penis. / - Gosh. Ogoo is a male dog. (Give me some privacy.) - Good job. Snacks? / - Good job. When he pees on the pad, you must give him treats. Of course, you bet! - Ogoo. / - Ogoo. Hoyoung does act like a kindergarten teacher. This is fun. - He's nice and gentle. / - Give me your paw. - This paw. / - Give me your paw. There you go. - He follows instructions. / - Yes, he can do that. He follows your commands. I'm happy that there is a lot of stuff I like. Is that so? Do you like the new dad? Bang, bang, bang. (Ogoo pretends to be dead with the gunfire.) He's dead. - He's alive again. / - Wait. - I have a gun. / - You do? (He goes into his room.) Good job. (Where did he go?) We can shoot with this gun. That's for a sniper. (He loads the rifle.) He might be scared of a big gun. (Seungjae, that looks scary.) Dad, who's cuter? Me or Ogoo? You're a hundred times cuter. I want you to stay like this tomorrow too. - Oh, no. / - Jiyong must be sad. - Should I stay the same? / - Yes, stay the same. (Feeling upset) I thought he was going to cry. There's a lot of fun stuff in my room. Of course, I know. Are we going into your room? - You have to use this. / - Okay. - You have to turn it. / - I have to turn it? That would fit there perfectly. - You're right. / - Right. - Let me try it. / - Dad, make it for me. I have to play with him like I'm his brother. Sure, I'll follow you. - Is the CCTV there? / - Play with this one. - Sure. / - You didn't know I was this good, right? You're right. I didn't know. I usually play with dinosaurs alone. Playing with you is more fun. - Do you mean that? / - Yes. Dad, hanging out with me is fun for you too, right? It's so much fun! Then why didn't you play with me before? - Then why didn't you... / - Oh, no. play with me before? - I didn't? / - He's been disappointed. - No, I wanted to. / - Seungjae meant that. You're right. I don't know why. (He has mixed feelings at what Seungjae said.) - His heart must be heavy. / - He's sorry. Try the one I'll make for you. Look. I'll make it for you. - Put these on here. / - Gosh. He's so affectionate - when giving snacks too. / - Add the jelly too. Jelly. Why don't you put them here? - There you go. / - He makes everything fun. (He makes ice cream that's trending online.) It's fun to make this with you. (Flashing his smile) You're so cute. We didn't usually do this together? You didn't play with me. Hey, I did. He's still yelling. (He's elated.) Dad, it's tastier this way. Is that so? (The ice cream falls down.) - He should scream now. / - Look. That's all right. (That's all right.) (Why isn't he upset?) (When Seungjae spills food on the table...) (Sighing) (Raise them until I finish cleaning this.) (I won't do it again.) You must keep them up. You must be punished. (He spills again.) (Jiyong used to get mad at this all the time.) Dad, I made a mess. Why aren't you angry? Everyone makes a mistake. Of course, everyone does. Wipe your mouth. There you go. You wiped your mouth very well all by yourself. You did a great job cleaning up too. I'm good at putting things away... - You are? / - and cleaning too. You're good at cleaning too? I'm good at jumping too. You're good at everything. You're all grown up now. You're so cool. (My new dad is the best!) Seungjae keeps smiling. Dad, why do you keep smiling today? (He's still Mr. Smile after all these years.) (His expression is polar opposite from Jiyong's.) Goodness, you're so cute. How could I not smile? What do you want me to do with you? Play with me all the time. - Play with you? / - Yes. I have been quite busy these days. I often came home late at night. I was upset when Dad returned late from work. I want to come home early, but there is a lot of work these days. I'm sorry. (I'm sorry, my son.) Is there anything you want to say to Dad? "I love you." Really? "I love you." (I love you too.) I need to go to the car for a second. - I will follow you. / - Will you follow me? - Goodness. / - It won't take long. I will be back in a minute. It must be time to bring back the old dad. I think Seungjae knows it will happen. He knows his dad will be switched. Goodness. This is unbelievable. - Dad. / - Where are you going? (Loving) I will be back in no time. Stay here for a second. Maybe he will hate it if I go back. I will be back in no time. (Make sure you do that.) - Stay home for a second. / - Okay. What a good boy. (Hoyoung goes out) (to meet the real dad.) Gosh, you worked so hard. Seungjae is so smart. Wasn't it hard? It wasn't hard. I bet it felt different since Seungjae isn't a baby like Jaemin. I know. Seungjae was more fun. He talks and thinks. It is thanks to you that I learned in which ways I lack as a dad. It was an important time. I reflected upon myself and learned a lot. I did the same. Let's meet up for a drink sometime. It must have been hard to stay in the cold. (Jiyong comes back.) (Is Dad back?) (He suddenly becomes mischievous.) Dad, your face changed. Did my face change? Yes, it did. My face comes back at 8 p.m. Did Mom tell you about how often my face changes? - Once a year. / - Once a year. I was surprised because your face changed. Who do you prefer, the current me or the previous me? (Expectant) The previous you. The previous me? Jiyong raised Seungjae for five years. The current you go, "Hey, Ko Seungjae!" That's why I prefer the previous you. It's not like you are Kim Seungjae. (You are pathetic.) How about this? "Hey, Ko Seungjae." Is that okay? (I have nothing to say.) As long as you don't go "Hey!", I like the current you more than anyone. - Is that so? / - Goodness. - Say, "Ko Seungjae." / - That's the answer. My cute Seungjae. My cute Seungjae. My cute Seungjae. Even you think it's awkward, right? My cute Seungjae. (My throat is dry.) - He is grimacing. / - I will try to become a kind dad. Okay. - All right. / - Don't change, Dad. Because I was busy, I didn't look after him as I used to in the past. I thought, "He's growing up well on his own." I took the matter too lightly. I think this exercise gave me a chance to look back on myself. I will change my ways to be a better dad.