MY MONSTER SECRET: ACTUALLY I AM... (Jitsu wa Watashi wa...), by Eiji Masuda. First published in 2013 and first published in North America in 2016.
PLOT:
Asahi can't keep a secret to save his life. Even when he tries, his complete and utter lack of poker face gives everything away in no time. That's why it's no surprise that his friends quickly figure out that he's crushing on Youko, the cool-tempered beauty of the class. When Asahi finally musters up the courage to confess his feelings, he discovers Youko's secret: she is a vampire.
Asahi swears to protect her secret at all costs so she can keep going to their school, but how long will he last when he has to struggle not only against his own feelings, but the efforts of his snooping classmate Mikan?
