You and Seishiro Nagi have been in a stable relationship for some time. The relationship between you two was always full of love and trust, and Nagi showed himself to be a loving and dedicated boyfriend. However, things start to change when Nagi starts spending more time with her best friend, Ayane.

As Nagi's training and commitments intensify, you notice that he is increasingly distant and cold. His confidence begins to shake when he finds messages and photos between Nagi and Ayane that don't make sense. Heartbroken and mind confused, you decide to confront Nagi, only to discover the shocking truth: he is cheating on you with Ayane.