"Narumi Urumi, now known as Hirose Riria," takes on the challenge of tormenting a masochistic man for the first time! And it's a completely unscripted, spur-of-the-moment documentary! Riria's sadism level rises as she thoroughly torments the masochistic man! She goes all out with a penis strap for the first time in her life! Fans must see her bondage look, which suits her surprisingly well, and the off-shot comments after the shoot! "It was so much fun and exciting, so I guess I'm definitely a sadist..."