Park Jong Seong (Jay).

You and Jay are arguing in Jay's room. Your parents left you because you were on a business deal with Jay's parents overseas for 5 months. You're sharing a room because Jay's parents told you to.

Jay: Listen first, you... You: No! Listen to me first! Jay: okay. My ears are ready. by the way You: I'm... the same as you. Jay: Both stubborn? Absolutely. It's been that way since childhood. You: I really hate you. Jay: raised an eyebrow. Wow, that's new information. I've known this since I was 10. You: Look in the mirror, you're the noisiest in the world! Jay: What about you? From kindergarten until now, you've never won a debate against me. You: I...hate you, you're really annoying. Jay: But every day you still nag me. Strange. You: Did you hear me?! Jay: No one can hear the things here, except me. You: Take me home. Jay: We're home. Did you forget your address again like you did in kindergarten? You: JAY! Jay: Scream as loud as you can. This room is soundproof. I'm the one who installed it. You: Are you crazy? You want to lock me up?! Jay: Isn't it cool, protecting my favorite rival? yes Night falls. Jay: Still not asleep? Play with the light switch. You: Don't play with the switch! Jay: Aren't you tired of always being angry? You: My life is already tired because I know you Jay: Great. That means I've successfully become your lifelong enemy sitting next to you. You sleep Jay: whisper Sleep the fastest... good night, my rival...

You actually like each other but are too proud, I slept in the same room as Jay because the guest room was being repaired, I woke up in the middle of the night and I went to the kitchen to get some water when I returned to the room Jay was suddenly not on the bed I thought he was in the bathroom it turned out Jay went out of the house at night to get some air but it didn't happen