Pure Blood
IF you read this, remember that it's only shounen ai, (and barely even).
Durarara!! dj - Sanguin no Bara
Haha that was fun!
Bousou Kareshi
After this, read 'Hatsujou Kareshi'.
Mugen no Roukaku
The plot premises were relatively original, but somehow the stories just felt flat. Probably because the pacing was off - As is often the case with oneshots, the pace was too fast, and there was no room for character development. As I was reading the first story, I was thinking of rating this manga only 1 star, but after reading all of the stories, I'll rate it 3 stars. There's another manga, 'Kinpeibei Kinden Honoo no Kuchizuke', which is a sequel of the last - and best - story in this manga, so I do want to read it. I'm trusting that it'll be better, as it's longer.
Kimi Ni, Meromero.