Following
Sorry, following
One word: FOLLOWING~
It's neither of those, but thank you very much. There was some kind of ceremony going on there too, and there's talk about bloodline. Can't really remember much since it's years ago.
Again, thank you Jamex.
Found it!
http://www.mangago.me/read-manga/shinshikyoutei_wo_musubou/
I got it wrong, though: it's the uke who has the dragon's blood, which the seme needs to drink. Anyway, it was last updated in 2011 and it only has 3 chapters so I guess it's hopeless. ┑(￣Д ￣)┍
Nooooo~ （/TДT)/
School/Supernatural manga where the dragon(?) guy seme needs to drink blood from transfer student uke. There was anothet guy that the dragon guy originally drinks blood from, but the transfer student kind of replaced him?