Tsume to Toge

Nanao Shuuji left his hometown, where his family owns a prominent supermarket chain, to work as a part-time teacher at a cram school. He is confronted by Takatou Kazuomi, the son of his father's mistress, who had previously been injured by Shuuji during an altercation with Kazuomi's mother. Kazuomi, aware of Shuuji's vulnerability, uses it to pressure his father for financial support and compels Shuuji to assist him, threatening him with a specific photograph.