Okay, Naoji is the vamp obvi bc Mitsu remembered vaguely seeing Naoji when he was a kid and he looked the same and also because Nao at the very least
claims to have been friends with Mitsu's grandpa.
Si
The question remains why the heck Mitsu is trying so hard to play into this vampire bit. Is he also a vampire and is just not smart enough to recognise another vamp?? Is he just not good at jokes??? Am I thinking too much about this???????
Also,
@Aoixneko it would be an incubus, not a succubus. A succubus is female, an incubus is male.