Shizuki Kokoro is a cosplay player known for her friendly and welcoming attitude as she approaches shy and passive older otaku fans, making them feel happy and comfortable, even helping them achieve a satisfying first sexual experience.

The girls in the class flock to the introverted boy with the lucky penis that brings good fortune when having sex, seeking the good luck charm of being “uplifted.” They eagerly have sex with him in hopes of achieving good luck, creating a lucky lewd harem where he can sleep with all the girls in the class.