Sukishiki Yuujoujutsu

1) Unmei no Hito (運命の人); Magazine Be x Boy 1999/03
Sensei always looks out the window and sees a student running. There, he started falling in love with him. But the sensei has a fiance and drama starts when the student also falls in love.
2) Pre Sukishiki Yuujoujutsu (PRE好き式友情術); b-BOY 11 1993/10
3~5) Sukishiki Yuujoujutsu (好き式友情術); Magazine Be x Boy 1996/05~07
Hiraiwa and Harui are best friends and neighbors. Hiraiwa loves Harui very much, but Harui always says that its "None of his business" or, "I don't care." Suddenly, Hiraiwa has to take a tough decision between leaving Harui to work in Osaka, or stay in college with Harui.

(Source: MangaFox, edited)