Daehyun wants to do something special on Valentine's Day. Youngjae doesn't 'cause Valentine's Day is for lonely people and they aren't.

Daehyun is a newbie photographer who's escaping from a bad guy, so he disguises as a woman with a wig and ends up crashing the party of a fashion magazine which Youngjae is chief editor.

Never it's too late for Seunghyun to say I LOVE YOU to Jiyong, never, but never.

Choi Seunghyun is a teacher of literature, every day he finds one letter at his door, he's the addressee, but there's no sender in the envelope. Every letter is telling a love story that makes him sad and lonely, then one night he meets a boy with pink hair and teary eyes and weak smile... The sender... Who's the sender?