Ren'ai Chu! Happy Perfect

Main character enters an elite high school where all love affairs are restricted. He has a girl pen-friend who wants to meet him in real life, but he does not want to risk dropping out of school. One day a new transfer student comes to share a room with protagonist and suddenly embraces him! Transfer student turns out to the pen-friend girl who used her twin brother credentials to sneak into this school. Is this the beginning of the end or a new fun life adventure?