Although she is not good at being in front of people, Ikka transforms into a bright and energetic person when she cosplays. She strikes cute poses in front of her real brother, starting an in-family photoshoot. However, this brother has a peculiar fetish and masturbates daily while fantasizing about his sister's still-developing body. On this day, he has a one-on-one photoshoot with his sister but skillfully lures her into the world of erotica, ultimately committing incest.
