Yuri, the ambitious president of the newly formed Eroge Research Club, recruits Mikoshiba to be the lead artist for her project to create the ultimate erotic game. After discovering Mikoshiba's secret sketchbook of perverted drawings, Yuri uses the art to blackmail him into joining. To further motivate him and spark his creativity, both Yuri and fellow member Saitou engage in explicit encounters with Mikoshiba, blending lust with artistic inspiration as the club's chaotic activities begin.
After being blackmailed by a fellow club member into serving as a biological reference for a new adult toy, Mikoshiba continues his "research" by seducing Himegami-san under the guise of needing a model for his art. As the Eroge Research Club makes significant progress on their game project, they realize they lack the necessary staff for coloring and voice acting, prompting a search for new members to help them reach the finish line.