Hige wo Soru. Soshite Joshikousei wo Hirou.

Yoshida, a young, attractive salaryman, had finally worked up the confidence to admit his affections for Airi Gotou, his boss and lifelong crush. Sadly, he was ultimately turned down, so to drown his sorrows, he went out drinking with his coworker and best friend Hashimoto. He encounters Sayu Ogiwara, a high school student who requests to spend the night with him, as he is intoxicatedly making his way home. Out of sympathy and because he is too worn out to dispute, he allows her in, promising to chase her out later. Assuming a more sober state the following day, Yoshida inquires of Sayu how she came to be at his flat. Sayu replies that she had fled her family and home in Hokkaido and had been prostitution to hapless men in exchange for a place to stay. Knowing her past, Yoshida feels awful for her and realizes he can't force her out of his home, so they start living together.