It's difficult for Ichika to appear in front of people, but through cosplay, she becomes as bright and lively as if she's a different person. At family photo sessions, she might strike cute poses in front of her older brother. However, unbeknownst to her, this brother actually has peculiar tastes and indulges daily in self-gratification, fantasizing about his sister's developing body. On this day, the brother is set to have a private photoshoot with his sister, and he skillfully drags her into the world of eroticism, proceeding to commit incest.
