Tatoe Toraware No Koi Demo
Aww, he wants to go spend time at the castle where he raped him. How romantic! I absolutely cannot stand this trope in yaoi manga. "I'm sorry I made you rape me! I love you so it doesn't matter what you do to me!!!"
Jikan Akima Jinbutsu
This is a very odd manga, but I actually kinda liked it. It's really dark and pretty depressing, but it's an interesting kind of twisted. There are four short stories, and only two of them are overtly BL, whereas the other two are sort of open to interpretation, I suppose. If you like dark, messed up stories, you should find these entertaining. It's definitely not for fans of a happy ending. This is more on the horror side than the romance side.
Gundog
Ha! This really is quite slashy. I wish it were just straight up gay, but that's all right. The hints are there. This is actually kind of similar (but not really) to something I've been writing for a while now. One of the main themes, at least. Maybe I can get some inspiration from it. Either way, this looks really cool, and I hope it stays that way.
Gintama dj - Mienai Kusari
Suuuuuper messed up. But it was psychological and fascinating like everything Harada does. I don't typically read doujinshi, and I've never seen this anime, but I love Harada, so I thought I'd read it regardless. I feel like I got everything without knowing the backstory, just from the context of this oneshot. I've heard this one described as the most disturbing yaoi, but it's not even in the top ten. Definitely messed up, but nobody got eaten alive, or raped by a horse, or disemboweled during sex, so it could have been worse. XD (And has been!) If you like mind rape and twisted stories, especially violence and torture, this is the manga for you. Otherwise, maybe go read something fluffy.
Nishikaidan No Akuma