A young man named Kenji is captivated by the beautiful housewife, Nao, who lives next door and has attractive limbs. One evening, Kenji finds Nao passed out drunk in front of his doorway. Hesitantly, he invites her inside to take care of her. Nao falls asleep in his bed, and Kenji, aroused by her vulnerable state, kisses her… Their illicit relationship, born from a chance encounter, has secret signals known only to them. Today, Nao hangs a single yellow handkerchief on the balcony to lure her neighbor…
