Mari, a fan of underground idol Haruna, placed a dildo on the crotch part of Haruna's poster and enjoyed fantasy SEX with her today. One day, Mari, who had invaded Haruna's dressing room, witnessed an indecent milk rubbing act between Manager Kuroki and Haruna. It was MARI who tried to stop it, but on the contrary, it was stabbed in the back of the vagina with a strap. Kuroki senses that Mari is overwhelmed and debuts as an idol, but... Intense pressure and excessive physical relations. A strap-on play by female director Haruna!