This time, the otoko no ko targeted by the research institute is Reina-chan, a model type with long, slender legs. Contrary to her appearance, she's actually a huge masochist!! She's injected with a secret medicine called "Double Fantasy," repeatedly cummed on with her ass, constantly dripping with endurance juice from her hard-erect clit, transformed into a body that feels multiple orgasms, rolling her eyes back, screaming "Iku, iku, iku!!" and reaching climax many times... The content may vary depending on the distribution method.