Skinny-ripped is such a good body type, too. Like Ed Norton in
Fight Club.
It's the awful contradiction at the core of all Tsunderes. Maybe they don't really mean it like that, but they sure act like a jerk all the time. A real life Tsundere is no fun. (Unless you specifically like being jerked around. (Or if they're really, really hot.))
But I agree with you, at this point in the story it's getting pretty tired. At the beginning, I was willing to chalk it up to youthful inexperience; he's just not aware enough of his emotions and hormones to handle this kind of flirtation without melting down. But 68 chapters later, he's had plenty of experience. It's past time to admit they like each other and then eat ice cream off their nipples.