Punch Up
I wish I could give this series 6 stars!! It got a bit cheesy/cliched with the amnesia plot device towards the end, but I love these guys so much it doesn't even matter.
Kanashii Kotoba
Loved the "sad/lovely" theme... Definitely describes this book as a whole. Such a bittersweet story, full of lots of sadness and terrible things happening to the characters, but also so deeply full of love at other moments. So glad that after such a sad backstory there was a happy ending!
Brother X Brother
Great series, but so overwhelmingly sad! Some absolutely awful things happen to the characters, particularly Kaname, and I wasn't prepared for it when I first picked it up. Thank goodness for a happy ending, but whew! You have to slog through some dark moments to get there, but it was a touching story.
Hana no Mizo Shiru