Beelzebub is one of the few manga that I think hasn't declined in story and humor like most.
Imo if that Aiba guy turned out to be another parent of a demon prince or something it would have made Beelzebub worse...
But

it turned out to be Aoi's summon creature thing taking over some random guys body just to mess with them lol...

...and Furuichi x Lamia ftw lol