Hige Wo Soru. Soshite Joshikosei Wo Hirou.

After his girlfriend of five years breaks up with him, Yoshida drinks to ease his heartache. On his way home, he finds Sayu, a high school girl sitting alone on the street. Sayu offers to sleep with him if he lets her stay, but Yoshida refuses to take her offer seriously. This begins their life together: Sayu is a runaway high school student, and Yoshida is a 26-year-old salaryman. Their story follows the two as they share a home.