In the quiet corners of a shared apartment, a young man named Nishikawara Yuu lives with his older sister, Nishikawara Reika, a popular manga artist known by the pen name Gorimatcho. Her world revolves around the creation of male-oriented youth comics, often filled with sensual themes. When she's deep in her work, she becomes emotionally unstable, and Yuu takes it upon himself to care for her, bringing her food and comforting her when she's at her most unpredictable. But after her work is done, things take a different turn — a seductive, intimate interplay between brother and sister, where the tension between them is as strong as the passion that follows.
Enter Hoshino Akira, a school friend and classmate, known for her gakko style and love of gaming. Initially taken aback by Reika's eccentricity, Akira soon finds herself drawn into the world of her comics, even becoming an assistant on occasion. What starts as a casual friendship soon turns into something more, as Akira's interest in Reika's work grows, and her own hidden desires begin to surface. The dynamic between Yuu, Reika, and Akira becomes more complicated, especially as Akira starts to call Yuu by name rather than addressing him as "oniichan," a shift that hints at deeper feelings and a growing intimacy.
As Reika's work continues to take over her life, the three of them find themselves caught in a web of seduction and affection. Whether it's through intimate encounters, playful teasing, or quiet moments of understanding, the bond between them deepens, revealing a story of passion, connection, and the quiet joy of being together. From the comfort of shared meals to the intensity of late-night conversations, the apartment becomes a stage for their evolving relationship — a place where emotions run high, and every moment feels like the start of something new.
