Keita, a young man who was fired from his company and evicted from his home, ended up staying at his brother's house until he finds a new job. However, even at his brother's house, he has no place to belong and is constantly berated by his brother with remarks like 'What a pathetic man, still a virgin at 30.' Keita, who wants to gain confidence, asked his sister-in-law Riko to take his virginity, saying it was his lifelong wish. Riko, sympathizing with Keita, agreed to let him have her body just a little, but in the "moment of insertion" she was overwhelmed by a numbing sensation of pleasure…
