Michi Kuroki, a second-year student at Sakuragabuchi Academy, carries herself with a serious demeanor as a member of the school’s discipline committee, reflecting her steadfast commitment to order and academic excellence. Her childhood friendship with the protagonist endures into adolescence, anchoring her role in his life even after his mother’s death, where she remains a pillar of his support network. When supernatural events involving Patricia, a princess from the underworld, trigger the protagonist’s mysterious transformation into a black cat, Michi becomes the first to uncover his secret.

As chaos unfolds from the underworld’s influence and the protagonist’s shifting identity, Michi grapples with deepening feelings for him, culminating in a heartfelt confession of love that intertwines with Patricia’s own emotions. Her disciplined exterior belies a capacity for loyalty and camaraderie, evident in her interactions with peers like Yuuki Asuhara, balancing rigidity with quiet empathy amid the turmoil.