GJ-bu keeps its clubroom rules loose enough to make every afternoon feel unpredictable, and Kyouya "Kyoro" Shinomiya soon discovers that joining the five-member group means becoming the only boy in a room ruled more by teasing, appetite, and awkward affection than by any official activity. What starts as a simple after-school refuge becomes a series of small, intimate encounters that are as strange as they are comforting.
Mao Amatsuka, the club president, is quick to bite Kyoro whenever she is angry or even bashful; her younger sister Megumi Amatsuka brings tea and desserts to the table; Shion Sumeragi adds a quietly composed presence as a chess prodigy; and Kirara Bernstein, with her fierce feline personality and love of meat, keeps the atmosphere lively. Each of the four girls holds some form of interest in Kyoro, so the club room is never short on tension, warmth, or playful misunderstandings. GJ-bu turns that everyday setup into a gentle comedy of personalities, where the club's unspoken rules matter less than the relationships forming inside the room.