7 : Sinful Maidens -

Nao views her past choices as "sinful," and much of her arc revolves around seeking forgiveness or acceptance from Haruka.

Nao is driven to explain her past actions and a specific "sin" she committed years ago when they were younger. It is revealed that she previously had a physical encounter with Haruka during a summer visit, which has deeply influenced her current feelings of guilt and devotion toward him. 7 : Sinful Maidens

The growing tension between Sora and Nao becomes a central plot point, as Sora begins to feel displaced by Haruka's growing intimacy with another girl. Nao views her past choices as "sinful," and