Otoko no Ko Gakuen! ~3nin no Otoko no Ko-tachi to no Unmei no Deai, Soshite Boku-tachi wa Koi ni Ochiru!~

My name is Yoshimasa. I'm an ordinary student.
One day my parents moved, forcing me to attend another school.
It was a private academy. The school distinguished between three genders: boy, girl and transvestite.
I wasn't friendless for long. A classmate named Koyomi talked to me.
Then I met the class president Kaoru, and Yuuki, an underclassman from PE.
All of us were just discovering our sexuality!

[Edited from DLSite English]