Saki Nakajima lives as Maho's neighbor after their close friendship fractured due to Maho's affair with Kamijou. Each night, she unwillingly overhears Maho and Kamijou's intimate moments through their shared wall, causing her profound distress. Saki nurses enduring romantic feelings for Naoki. Upon his return to their hometown after an absence, she deliberately approaches him to pursue her own romantic agenda.