"Souichi Miyato" is a member of the Game Research Club at university. He was living an ordinary but enjoyable campus life.

Then one day, he ended up lending a "romance simulation game" to "Kazuha Takamura," a cheerful junior from his club.

――However, he realized he had given her a "hardcore, erotic game." ――

Souichi braced himself for the worst possible misunderstanding, but Kazuha's reaction was unexpectedly

"That game was super interesting!"

Thus began the story of Souichi and Kazuha, a cheerful junior with a broken sense of personal space, starting from this incident.