He's actually lucky that he's an immortal vampire: anyone else might not be able to bear her cruelty. The titular Kaguya is a self-acknowledged tsundere: she doesn't want to let her feelings show.

She then shows a bit of a “tsundere” side when she gets riled up after the protagonist Aoi Itsuki says “I don’t think it was all for nothing, I got to see a different side to you after all.” ...

“Crash Course in Romance” follows the bittersweet scandal between an owner of a side dish shop who belatedly enters the world of entrance exams and a star instructor in Korea’s elite private ...