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Rino, a mother-in-law who lives with her husband's stepchild Yoshio in a house where her husband is posted overseas. Recently, I've been conscious of Yoshio as the opposite sex. However, Yoshio was delusional about Rino being seduced by his friends and being dragged into the abyss of pleasure, and he was crazy with jealousy alone. Yoshio spends the night unable to suppress his feelings. Will their thoughts eventually become clear and overlap?