While making a living as a private tutor, Ririka is actually a hardcore, genuine masochist who regularly visits her trainer. She performs dogeza completely naked in front of the entrance, has her head stepped on by shoes, and acts as a female dog, showing absolute obedience to her master's orders. When bound with hemp ropes, she repeatedly squirts from climaxing, wearing an expression of ecstasy at the clear rope marks left on her body.