[Fujiya (Nectar)] Ore ga Kawarini Sakyubasu Yatte Yaru!!

A voluptuous, horned demon girl with pointed ears and a maidlike combat outfit makes a desperate bargain with an exhausted man, offering to use the vitality gathered through intimacy to restore his original body. In a sparse bedroom, the awkward explanation of the failed transformation gives way to increasingly intense experimentation, with her magic and his overwhelmed reactions pulling them deeper into the spell’s consequences. By the final confrontation, she abandons hesitation and vows to remain beside him until he is restored, her protective devotion becoming as consuming as the possession threatening to consume him.