Ikusen no Toki o Koete
Masara Minase2012

Kei, an ordinary high school teacher, and Haruto, a popular model brimming talent and blessed with an abundance of good lucks, were raised as non-blood related brothers.

The focus of his younger brother's extreme fixation, Kei engages in a relationship that is more than familial. Although confused, Kei accepts this as the status quo. However, one day Haruto's real father appears and...?!