Atsushi was staying at his older brother's house while searching for a new job. One day, he received a troubling report: a local man had threatened to assault his girlfriend. To resolve the situation, Kasumi went to confront the man. However, the man became irrationally furious, threatened her, and used her brother-in-law's future as leverage—forcing Kasumi to submit to his lewd demands. Unaware that everything had been orchestrated from the start, Atsushi later overheard the man boasting about humiliating his sister-in-law. Hearing of Kasumi's disgrace, Atsushi was overwhelmed by a twisted mix of jealousy and arousal toward the woman who had sacrificed herself for his sake.