
LMAO I was about to ask this

No it's quite a regular reaction.

No. I think it's because he's mad at himself for assuming that inui told his secret to the girl.
He realized that he's the wrong one here, and feels guilty and pissed at himself.
And maybe realized that inui has been nice to him the whole time...?

i think he was just uncomfortable...
Why did he blush/freak out at the end??