When Suekichi, a university student with typical hobbies, suddenly finds himself waking up next to a seductive girl after his great grandfather's funeral, his world takes an unexpected turn. Inheriting a peculiar legacy with strings attached, Suekichi must navigate the enigmatic presence of Aya, who lingers with mysterious intentions. As their peculiar bond unfolds, a mix of suspicion and longing sets the stage for a unique and captivating relationship.