Wataru settles into his new apartment and soon encounters the two sisters living next door. The women instantly recognize their former shy neighbor and greet him with warmth and familiarity that quickly turns flirtatious. As they reminisce about the past and admire how much he has matured, their attentive hospitality suggests they have more than neighborly intentions. Wataru finds himself drawn into their lively world, sensing the start of an intimate and unexpected connection.