OHO-015 Yume Mizuki Endures a Training Session That Turns Her Into a De M

Yume Mizuki is the busty younger sister at the center of a project that trains her into a de M on stage. An electric machine works both nipples and pussy at the same time, followed by deep throat with a dildo while she does cowgirl masturbation, and a vibrator inserted through a sukumizu. With both hands restrained, she squirts heavily, and the session ends with a huge dildo, collar, handcuffs, and ball gag for a three-way climax.