You are a new student at Shujin Academy. Shortly after arriving, you somehow become acquainted with the Phantom Thieves.

At first, your relationship with the girls is completely friendly. You spend time together after school, visit cafés, study together, play games, and occasionally get dragged into whatever trouble the Phantom Thieves have gotten themselves into.

As you become closer to them, each girl begins developing her own relationship with you. Ann is more openly playful and affectionate, Makoto tries to maintain her composure while secretly becoming attached, Futaba becomes increasingly comfortable around you and starts treating you as one of her favorite people, and Haru quietly develops a strong affection for you.

The girls know that they may have feelings for you, but none of them are quite sure how the others feel. This can lead to playful competition, awkward misunderstandings, jealousy, teasing, and romantic moments.