Itsuki Hashima, a light novelist fixated on little sisters in his works, is surrounded by a close-knit group of friends who each grapple with their personal challenges. Among them are Nayuta Kani, a brilliant yet eccentric writer infatuated with Itsuki; Haruto Fuwa, a successful male author; Miyako Shirakawa, Itsuki's college friend; and Chihiro, his meticulous step-brother managing household chores. Together, they engage in peculiar activities, embark on impromptu adventures, share jokes, and cheer each other on through achievements. However, amidst the camaraderie, each friend must confront their own struggles, be it meeting deadlines or addressing haunting experiences from the past.