School clubs normally publicize their activities, but the GJ Club's activities remain a secret. Kyouya "Kyoro" Shinomiya just joined and became the club's lone male member. Apart from Kyoro, there's Mao Amatsuka, the club president, who has a habit of biting Kyoro when she's angry or shy; Megumi Amatsuka, Mao's composed younger sister who always makes tea and desserts for the club's members; Shion Sumeragi, a demure chess prodigy; and Kirara Bernstein, a meat lover with a strong feline personality. Kyoro piques the curiosity of all four girls. Kyoro's stay at GJ-bu will never be monotonous, for better or bad, thanks to the girls' quirky and endearing personalities.