May not really fit into this list for it’s generally a cute and fluffy BL, but there are parts about Rin’s feelings and his character as a dragon(non-human) that could be considered twisted by human standards. Dark undertones. Otherwise, a great story and some additional, surprisingly realistic, reactions.
You may feel your favorite manga should be gathered together into distinct categories for your own reference and, now, you can do this with a LIST. After you've created your list or lists, you can proudly recommend them to other manga fans to showcase and share your taste in manga.
Nii-chan (harada)