I also think this is starting to wrap up, but given that this is a slice of life monthly manga it could very well be years for that. The rock concert could and most likely will go terribly.
As for the Hina x Nitta ship, that shit wont happen. Like someone said Hina is a daddy girl due to him treating her as a human + her neet goals, but so far it has all been despicted in a family fashion and not an usagui drop one.