Yuji has long harbored deep feelings for Izumi, his childhood friend. Having grown up without ever knowing his mother, he found comfort in Izumi's gentle and warm demeanor, which served as a maternal substitute. But now that he's matured into a full-grown man, those feelings have transformed into romantic desire. One day, he discovers a beautiful set of women's lingerie in the laundry basket and realizes it belongs to Izumi, triggering an overwhelming impulse he can no longer suppress. Eventually, Yuji resolves to confess his true feelings to her.