Notes

TATB: Kitty meets Dae on a trip. They start a long-distance relationship. He studies in the "KISS", and his mom is dead. He tells her a secret: MH used to be called 'poopy baby'
XK: K discovers that before her mom died, she went to KISS during her junior year with a scholarship (there he met Y's mom, her bestie). So K applies and gets in (schola too). She doesn't tell D / Once there, a girl in her taxi (celeb) tells her she has a summer bf. At school, K surprises D. Then the girl (Yuri) arrives, and tells K D is the bf (in reality he is a fake bf - only they know). / K's roommates are D, Min Ho (rich), and Q - D tries to explain but K doesn't let him - While watching D & Y on TV, along w MH and Q, K notices the relationship is fake and yells it. / Y has a gf! (J, who moved away). She tells D after he signed the NDA contract. Y allows D to only tell K / Before telling K, D finds K called MH 'p b' aloud in class. D realized he can't tell her about the fake relationship, so he breaks up w K. / Q finds out about the breakup, then both find K has a half-sibling in Korea - K's new roommate is the worst & K can't transfer / K and D are friends. / D tells MH he still likes K (she doesn't know) / K moves back w boys / K and MH start being friendly, he knows her story / A tells K prof Lee is his dad & doesn't know. / K sends gift to D's house (necklace) but Y takes it. K is mad / Y overhears K talking nice 'bout her / MH likes K / D finds out what Y did, and confronts her. - D explains situation to K. / K, Y, Q, & F find out K & Y's broke their friendship 'cause of someone (Lee? we later learn it could be 'Simon'). / K tells Alex principal is his mom / Y discovers her mom was the cause J left (she found out 'bout relationship), so she breaks up w D. - D and K kiss. / MH now likes his admirer / K thought relationship was actually not fake but Y just told her it was, because she is gay. - K is angry at D 'cause she doesn't want to tell her why he lied. / Y makes D take K out a date, where they confess their love (D 1st) / MH breaks up w his admirer / A tell principal she is her mother. She tells her hubby. Y hears, and lets it know. / Y comes out, & tells K 'bout Y's brother. / D & MH tell Q they saw F w someone else. - F & Q confess their love & F tells him that that's his bf but doesn't love him. Q is mad. / Y's mom accidentally tell her A is her brother, & that K knew. Y is mad at K. / K tells D she likes Y, since they became friends. D breaks up w K. She cries. MH was near & heard / Y's mom gather Y, A, & Lee. Tells them pt. 2. Ji fixes the Ju situation / They start spending more ime together / K tells her D and Q everything. / K plans to leave for winter break / K is discovered in boy's dorm, so she expelled / D gets 2nd place so also has to leave school / K leaves D necklace - at airport. they talk, they tell each other they were the perfect first couple / On plane back, K sees MH next to her. K asks her why in economic class & why to LA. He tells her she looked like she needed a friend & that to see his mom. She also tells her he fell in love w her.

Q's dating Florian. F's parents are divorced. F is cheating?
Yuri's mom and prof Lee are Alex's parents. He is adopted.
K has no secret siblings.
Y's mom: Jina / Lee: Daniel Lee