Akira, who had crossed the line with his sister-in-law Rin. The trigger was his wife's elopement. They had a fight and he was drinking alone when Rin suddenly came over. She said she came to help him with the unfamiliar housework. Believing her words, he ended up falling into a trap. When Akira found out that Rin's real purpose was to satisfy her desires, he tried to escape by mobilizing all his reason... but his reason began to crumble under Rin's persistent temptation...
