Well, in ch41, I laught at the knuckles rings being put is if it was a marriage proposal. Kinda reminds me of Spy X Family's proposal with a grenade pin. XD
Even though it's a quick and simple ending that could, in theory, be expended, it ends properly by avoiding too much stalling and/or power leveling. Kaiju #9 and the source kaiju got defeated at great costs. The only possible thing that could follow story-wise would be cleaning up weak kaiju, having some new stronger kaiju that would erase countries (which would make anything way out of proportions), repeat of #9 such as it escaping or something or expending on the socio-polotical aspect of my intelligent kaiju who aren't evil in nature (as we know some has lived for long time ourside of humanity reach)
It's insane how things seems to escalate again and again! For every "good news" there's a 10-tons bad news that fall down onto the plot.
Cool story that was recommended after reading something else. But from the upload dates, I guess this manga might be buried. Gonna need that necromancer/priest chick to cast her spell again I guess.