Yuko, a yoga influencer, is a super siscon, and she knows that her beloved sister is bringing her fiancé, me, and decides to prevent it with an event. - When I noticed the abnormality, I remembered that Yuko was doing a strange trick to her with something like a penlight, and on the contrary, I took revenge training by holding Yuko. I try to solve my fiancée's event while making it a sex slave ...