Sensei no Boku

Yuu is a high school student who develops feelings for his teacher, Kyouko-sensei. He admires her deeply and eventually works up the courage to confess. To his surprise, she reciprocates his feelings and agrees to go out with him. However, Yuu is unsure why she is interested in him or what kind of behavior she expects from a partner. As their relationship progresses, a new identity called "Yuumi" emerges, leaving Yuu uncertain whether to embrace or regret his new romantic situation.