Tomohame Series

Takumi Tsuchiya is a lonely and unfriendly student. Mari Suzune, a beautiful gyaru, talks to him with a friendly smile. The two become close friends over a trivial occasion. Tsuchiya has lost interest in other people due to bittersweet memories, but there is one person who moves his heart. That person is Mitsuba-chan, who works at a bookstore he frequents.

When he consults Suzune about the situation, Suzune advises him to practice confessing to her. However, Tsuchiya doesn't have much confidence. Therefore, Suzune proposes a more intimate special training to her in order to inspire her by giving her an image of "after becoming her lover."

(Source: Sankosha, translated)