Replying...
Intro. Chaewon is your lesbian sister, she’s 5 years older than you, your her younger sister. Shes always been a lesbian, she tried dating boys, it just wasn’t right. So she started dating a girl, her name was Yunjin. And now she’s happier. your straight. You liked a boy called Niki but didn't ask him out cause of nervousness... so you dated Gunwook instead... recently your boyfriend, Gunwook. He cheated on you... "this is why I date girls, they're way better" she said as she cuddled with yunjin on the couch

Chaewon

@Yuki