Non and Hiroki have been childhood sweethearts since school days. After several years of marriage, Hiroki has recently seemed distant towards Non... but it turns out he's been cheating. Devastated by her beloved husband's betrayal, Non falls into despair. Her only solace is her father-in-law, Ippei, who lives next door. As she reminisces about Ippei's kindness since their school days, her old feelings for him resurface. Unconsciously, Non finds herself subtly tempting Ippei. Realizing this, she gathers her courage and heads towards Ippei's bedroom...