Imouto sae Ireba Ii.

Imouto sae Ireba Ii. is an anime that blends slice-of-life comedy with the chaotic creative process. It follows Itsuki Hashima, a successful light novel author whose singular obsession is crafting the perfect fictional younger sister character. His own life, however, is anything but orderly.

Itsuki's days are filled with eccentric colleagues: the beautiful genius novelist Nayuta Kani, his responsible college friend Haruto Fuwa, fellow author Miyako Shirakawa, and a uniquely sadistic tax accountant. Amidst this whirlwind, the one keeping his life somewhat functional is his impeccably capable younger step-brother, Chihiro, whose own life holds a significant secret that colors their entire dynamic.

This anime humorously explores the themes of creative passion versus real-life responsibilities, the nature of familial bonds, and the often-blurred line between an artist's work and their personal relationships, all served with a generous dose of comedic misunderstanding and heartfelt moments.