“That makes a grand total of 100 thousand dollars.”

After Tsukasa’s mom is killed in a car accident, her dad becomes addicted to drinking and gambling. One day, he disappears, leaving Tsukasa with a debt of 30 thousand dollars. There’s no way a student like Tsukasa could get her hands on that much money! Eventually, debt collector Reiko shows up, inviting herself into Tsukasa’s home and telling her to pay up. She offers the young girl a way of getting cash fast: by selling herself to Reiko. “Want to sell me your body?” Tsukasa agrees without really understanding what that entails, and when Reiko moves in with her, their relationship suddenly takes an unexpected turn…

Every Thursday, Kei receives packages to support her shut-in lifestyle. At her previous job, she was the victim of sexual harassment and has since found it difficult to be around other people, leading her to work freelance. Then she meets Rinko, the new delivery girl with a positive and cheerful personality. As their relationship begins to grow, so does Kei's curiosity for her.