GVH-531 - Initially, a naturally sensitive, developing stepchild who absolutely wouldn't say "Okay...", was raised through nipple management and discipline by a middle-aged man, and driven to the point of begging with lewd language, ultimately being turned into a lascivious female dog. Shiruya Mikuru.

The highlight is seeing Mikuru-chan's nipples relentlessly tormented, distorting her expression. Her face, which suits black hair so well, looks great in a uniform as she becomes more proactive, and her butt in those tight shorts showing off her muscles is cute too. The spasms throughout the video… I remember feeling a subtle vibration down there during the deep thrusts, and it felt amazing. Whoa…

I doubt many women will understand, but there's a lot of guys who are into this subtly cute type. Mikuru's "No..." isn't just a cute reaction, it's a moan that completely breaks your willpower. She's got serious skill. Definitely a keeper.

This is a trending nipple-focused work starring Shirone Mikuru (Mashiro Mikuru), who has incredibly sensitive nipples. Sugiuara Bokki, the actor playing the lecherous old man, shines with his sticky character. Mikuru-chan, as always, looks pure and incredibly cute in a uniform. She's a beautiful, classic idol-type girl with a face reminiscent of Yukirin. The story revolves around Bokki relentlessly teasing and training her sensitive nipples, making her feel and get excited, and eventually turning her into a desperate bitch puppy – just as the title suggests. You get to see a lot of Mikuru's limp, dazed, and melting expressions, and honestly, they're incredibly erotic and cute. Especially from the middle of the video onwards, the scenes with the hand and foot restraints and toy training really ramp up the excitement. The scene with the revealing, sheer mini-uniform is also amazing, with her drooling and getting drunk, followed by incredibly erotic fellatio, and then during the actual sex, she moans and cries out like a real bitch puppy – it's disgustingly erotic. The final heat-induced sex, with Mikuru becoming so horny she even licks Bokki's… well, you get the idea, is the best, and every chapter is a highlight in this masterpiece. Plus, you get a good look at her beautiful ass, another of her charms, making it a very satisfying experience. As a side note, there's a nipple work of hers on LUNATICS too, but this one is definitely more erotic (personal opinion). Seriously, a masterpiece.