Mari, a fan of underground idol Haruna, has attached a dildo to the crotch area of ​​a poster of Haruna and is enjoying fantasy sex with her again today. One day, Mari sneaks into Haruna's dressing room and witnesses manager Kuroki and Haruna lewdly fondling her breasts. Mari tries to stop them, but ends up getting penetrated deep inside her vagina with a strap-on. Feeling that Mari has potential, Kuroki lets Mari debut as an idol, but... Bold penetration and excessive physical relations. Female director Haruna's strap-on play!