It's fine. [Not... actually sure how well it'll heal really, but his special snowflake vampire blood is working at it regardless, and it will likely at least look healed before Fuuma could treat it.
Not that it will be much comfort to him once he knows why Kamui is injured...]
[So he sits, looking up for a moment, at the blood on Fuuma--feeling bothered at the sight despite himself. He looks away not too long after, voice dropping to a soft murmur.] I'm sorry I didn't come sooner.