A Sister's All You Need

Itsuki Hashima, a light novelist with a strong affinity for stories about little sisters, is surrounded by a close-knit group of friends, including Nayuta Kani, a skilled yet eccentric writer with romantic feelings for him. Haruto Fuwa, a successful male author, and Miyako Shirakawa, an old college friend, round out the group, which also includes Chihiro, Hashima's responsible younger step-brother. The friends frequently engage in lighthearted activities like playing games and sharing laughter, while also confronting their individual personal struggles.