Saiai Devil

Trama

Ai Sugawa, a 16-year-old girl, harbors a long-standing affection for Naoya Senpai, a popular and seemingly unattainable star of the track and field club. As she prepares to confess her feelings to him, a demon named Aya the Beast suddenly appears. With dark black wings, the demon addresses Ai, stating, "It's been 11 years, Ai," leaving her shocked and confused about his identity and purpose.