Nanao Shuuji left his hometown, where his family ran a renowned supermarket chain, and decided to work as a part-time instructor at a cram school. During his tenure, Takatou Kazuomi, his father's mistress's illegitimate son, approached him. Shuuji had previously confronted Kazuomi's mother, resulting in Kazuomi's injury as well. Kazuomi knew about Shuuji's vulnerability and used a specific picture to blackmail him into providing financial aid. In return for Kazuomi's silence, Shuuji reluctantly gave in to his demands.
