Mephistopheles: Touno Sayuki-hen

Sayuki Touno is a quiet and reserved high school girl who finds herself drawn into a mysterious and dangerous world after a chance encounter. Her ordinary life takes a dark turn when she meets a enigmatic figure named Mephistopheles, who offers her a deal that she cannot refuse. As she becomes entangled in his schemes, Sayuki must navigate a web of temptation and desire.

Bound by a contract, Sayuki discovers that her new connection comes with a heavy price. She is forced to confront her deepest fears and hidden desires, all while trying to maintain her sense of self. The line between reality and fantasy blurs as she is pulled deeper into Mephistopheles' world, where every choice has consequences.