AV actress "Reona Maruyama", who has been abstaining from sex for a month, attacks the home of a man suffering from erectile dysfunction! She is transformed into a sex-crazed monster with a powerful aphrodisiac and brainwashing! She suddenly becomes a beast, biting into the man's dick! She cums inside him repeatedly! She even has a cuckolding experience to improve her erectile function! The end is a lovey-dovey creampie sex... This is a new sensation erection improvement documentary!