Mimi the Cross-Dresser and His Boyfriend Kei

1-3. Josou Danshi Mii-chan to Sono Kareshi? Kei-kun (女装男子みいちゃんとその彼氏？けい君, Mimi the Cross-Dresser and His Boyfriend Kei)
Life is peaceful for Keiichi at his all-boys school. But one day, his classmate and best friend, Minami Sonoda, asks him out. Confused by these sudden gay advances, Keiichi rejects him and makes a run for it... But, that's not where it ends. The next day, Minami appears in front of Keiichi again, dressed completely as a girl, and brazenly vows never to give up on Keiichi's heart...!! Will things at school ever be the same again...?

(Source: Renta!)

4. Nagasare Toudou-kun to Kojirase Kitamine-kun (流され東堂くんとこじらせ北嶋くん)
5-6. Bokura Platonic... de Irareru Wake Nai Daro! (僕らプラトニック…でいられるわけないだろ!)

Note: Includes two extra chapters.