Do you know any quality novels where Mc is a vampire, and HE is hiding his identity as one? I don’t really want harem, but if there’s nothing else then it’s ok as well. And I would appreciate it if mc was handsome.... and in high school... but it’s not necessary.
After Taken as a Prisoner of War, the Vampire Queen Turned Me Into a Vampire and Made Me Her Daughter you might like this, the mc is a vampire/knight and is hiding his/her abilities this is not a spoiler since it happens at the beginning of the second chapter but the mc freely changes between his/her male knight and female vampire princess forms there is a bit of school in there as well and i don't remember any harems in the first volume i read
I've once read the whole The Chronicles of Vladimir Tod. Was fine, nothing special. Only thing that made it special for me was the fact it's one of those rare vampire novels I've read.
if you're okay with BL, there's Bite Your Fingertips! it's not explicitly mentioned that he's a vampire (he just suddenly needs blood to live)
What It's Like Being A Vampire The MC isn't handsome tho Only 60 chapters translated the rest you need to read machine translation.
@Bellahafra originally boy but turned into a girl just as a title says, and now he/she can switch between the two sounds weird but i really did find the world enjoyable and interesting.