26-year-old Yoshida is an employee at a major IT company. He meets a high school girl on his way home after drinking. Yoshida's crush had decisively rejected him after he pined for her for five years, and he had decided to drink his sorrow. Sayu, the runaway high school girl he meets, says they could sleep together if he lets her stay with him. Yoshida chides the girl for the suggestion but eventually lets her stay with him.