Toilet-Bound Hanako-kun follows Nene Yashiro, a high school girl obsessed with romance, who summons the mysterious spirit Hanako-kun from the school’s bathroom to grant her wish. Instead, she becomes entangled in a world of supernatural beings and urban legends tied to the academy. Hanako, far from a simple ghost, hides a dark past and acts as a balance keeper between spirits and humans. As Nene works alongside him, she uncovers secrets about the school’s Seven Mysteries and her own fate. The story blends humor, emotion, and eerie folklore into a unique supernatural narrative.