Ane Comi

Ryouta is a high school student with an unusual distinction: his older sister is an aspiring manga artist. She is deeply focused on her craft and, at 21, has no experience with romantic relationships. When she lands her first job writing an erotic manga, she faces a challenge she isn't prepared for. To help her understand how to approach the work, she turns to Ryouta, asking him to act as a model, despite his hesitation.