Landlord Kitashima became intensely interested in the personal life of newlywed wife Hina after she and her husband moved into his apartment building. Feeling unsatisfied in her marital sex life, Hina grew increasingly aware of Kitashima's presence, emotionally stirred by his seemingly kind yet forceful attention. Lured by his words of "practicing to satisfy your husband," she could no longer suppress her sexual frustration and surrendered herself to him. Kitashima's kindness appeared genuine and gentle, yet beneath it lay a strong, hidden determination. Hina was consumed by his seduction, gradually entering into a new, illicit relationship.