Hijikata can be—is—often oblivious to subtleties but not subtleties concerning needing some sort of assistance, even if he's used to more... dire situations. Nevertheless, he can very clearly see her nervous uncertainty of the situation and the fact she's insisted again she would be willing to call ( the fact she says she doesn't mind calling him ) is yet another good indicator. He doesn't really find the idea of babysitting drunk teenagers something of a good time, though... but, what else would he do other than wait around nearby until Kodou returned.

It takes him a moment, even so, however, to finally speak. He swallows before turning back to her and away from towards the room things are happening in. "...All right."

Go ahead and call him, Chizuru. He'll go play mom to the drunk children.