Kotone is embarrassed to be in front of people, but when she cosplays, she becomes proactive as if she is a different person. She starts a photo shoot with her brother, but as he gets excited, the photo shoot gradually becomes more obscene... Her crotch is exposed, she is forced to hold her brother's dick and it is forced into her mouth, and when her pussy is licked until it is wet, she experiences pleasure for the first time.