Chisato Nee-chan to Gachi-hame

Chisato is a young woman who shares a close bond with her younger cousin. Their relationship takes an unexpected turn when they find themselves in increasingly intimate situations, starting from a shared bathroom encounter. As the story progresses, their connection deepens through various encounters, including a trip to the pool and other private moments.

The narrative follows the evolving dynamics between Chisato and her cousin, exploring the boundaries of their relationship. Alongside their story, other characters like Tamae, Mei, and Haruka experience their own passionate entanglements. Each chapter delves into the complexities of desire and forbidden attraction, set against everyday backdrops that blur the line between normalcy and taboo.