
A legendary collaboration between AVSCollector’s, TARANTULA, and Baby Entertainment! Witness the ultimate 'ultra-pleasure torture' that every man dreams of—and fears. Once these succubi set their sights on you, there's no escape. Experience the full, raw details of their lewd techniques as they drain every ounce of your energy. Succubus? A demon that invades your dreams and devours your essence... are you ready to face them?




















*What happens to a man who is forced to learn to cum in his butthole? Suddenly, that question crossed my mind. The pleasure of female orgasm exceeds the pleasure of masturbation. I didn't feel like I could ever go back to normal sex. The humiliating feeling of having my ass played with by a woman while on all fours was so exciting that I couldn't bear it. The way a strong man falls from the end of humiliation to the pleasure of the butthole was well depicted, and the way the women spoke to the strong man was also good. Masaki's finger technique is amazing, and the asshole fisting by Shino Aoi and Mirai Sunohara in episode 4 was also excellent. I think this Ultra M Erotic Research Institute series is what sparked the current female orgasm boom among men. I especially want you to watch the Osugasm series directed by Nao Masaki.
*設定はいいのだが、毛むくじゃらの男優や腹の出たオッサンの裸を見ると萎える。 もっと普通の見ていて気持ち悪くない男優はいるだろうに、なぜこの男優たちなのかが疑問。
*I blame the man. The spirit will collapse. It's a good work.
*It was really good to have sex while tickling the soles of her feet. I would like to see her tickling other areas besides the soles of her feet.
I bought this for Mirai Sunohara. It's a shame everyone was wearing clothes like lab coats at the beginning. I was hoping for maximum exposure with tiny micro-bikinis in the second half too. I'm satisfied that Mirai went fully nude, but the other two were too tame. Shino Aoi, for instance, is known for being super lewd and showing everything in her other works, draining me dry, so I wanted her to go nude and have a sexy showdown with Mirai. I only knew Nao Masaki as a director of lesbian films, but she's quite a beauty. I really wanted to see her naked too. Mirai's sex scenes were also a bit tame. I wanted her to moan more lewdly and have a more obscene session, showing off to the other two. Other reviews seem to rate this highly, but it seems my tastes differ from those who don't just care about full nudity. I wanted to see the most intense, messy threesome possible. But I guess the theme of the work is different. I choose works based on Mirai alone, not the theme.