Kaede Aoshima's latest film is probably her most hardcore to date.
You might recognize her from these titles:
I gotta say I'm more a fan of the "Training" genre than the Lolita genre in general, but they often overlap. Individual films that emphasize training are great, but actresses whose career's reflect it are special. Many girls come in clearly experienced/comfortable while others have a marked progression.
For example Karen Haruki
She starts off for First Star, she probably looks her best in these films and the scenes are fairly hardcore, but she seemingly wouldn't swallow during the whole scene after kissing or a blowjob. She would just hold it in her mouth until she accidentally drools it out when she is getting fucked particularly hard.
She has quite a few movies, most of them good and gets progressively more hardcore. She doesn't seem coerced (I'm sure the money, and necessity in order to get more work plays a factor, but I mean it's not like her scenes are "r***-y"), but gets a lot more accepting of more hardcore acts while still having some a fairly genuine and innocent reaction to it.
By the time she stars in NITR-161 she isn't exactly shy about swallowing anything.
I now have my eye on Shizuku Kotohane who debuted in MUM-200.
Now I doubt she actually lost her virginity in this film, but I'll be damned it it wasn't the most convincing I've ever seen (and wasn't the bloody mess STAR productions usually are). She isn't the shortest, but she has I think the smallest/tightest vagina in JAV right now.
She too has gotten more hardcore in subsequent films, seems to enjoy the sex more, and is more adventurous I'm hoping for a breakout performance soon.
That's the highlight of the genre to me and that's why Minimum, k-tribe, and gentlemen are my favorite studios at the moment.