
I tend to stay away from gore and ...bloody ones after Kanpai dj, but this is the worst one I've read imo. It's pretty tame physically, but emotionally fucked up I guess, enjoy:
http://www.mangago.zone/read-manga/gintama_dj_mienai_kusari/

Since we're talking about weird ass yaoi, might as well put this one
http://www.mangago.zone/read-manga/feeding_lamb/

O yea.. I just read that last year. Its a long ass story so i kinda got lazy reading it (and there was too many dialogues) but i can tell that it's disturbing. Not just the characters but the whole setting was crazy. It would have been one of the mangas that I'd like if it wasn't for the art cuz i really didn't like it. ╮( ̄▽ ̄)╭

Well, as for me, i didn't finish it. It was too inhumane for me. And as far as I know, the maid can still pain despite being immortal (she screamed "it hurts" on the seppuku scene) and oh gosh i honestly can't handle it. The people there was just terrible to do something like that.
I didn't even get to the part where they blended the baby as what damndam said (tho im curious) BUT NO. IT'S A NO (╯°Д °)╯╧╧

Then you've definitely not seen Kabe yet ( http://www.mangago.zone/read-manga/gintama_dj_kabe/) out of all Harada's work, Kabe's my worst nightmare. It made me unlike the GinHiji pair for a while (and they were my OTP for fvcks sake!) that's why it managed to be my #1 on my blacklist.

Honestly speaking I actually enjoyed Boku no Pico no matter what other people may think. It's just a shota manga in motion. People take things to far and over analyze things. Just because someone loves shota manga doesn't mean they're going to go out and have sex with a child. It's not that serious, and if someone does have sex with a child and don't just stick to this damn fantasy is a sick

Honestly speaking I actually enjoyed Boku no Pico no matter what other people may think. It's just a shota manga in motion. People take things to far and over analyze things. Just because someone loves shota manga doesn't mean they're going to go out and have sex with a child. It's not that serious, and if someone does have sex with a child and don't just stick to this damn fantasy is a sick fuck. ( ̄へ ̄)
For those who says Boku no Pico's the worse and acts like it's the end of the world, you haven't even seen the worst yet.
Sorry, I'm kinda snappy cause I just read something that's even worse than this.