This manga is so terrible, I have no words for it. The only redeeming quality it has is the art, but it can't save it in the long run. It has a very bland and boring main character who likes to play the hero, even though he is horrendously weak. He acts in a completely unrealistic way, jumping into action and being hyped to fight 15-meter monsters out of hell like it was all he ever did. No sane human being would do that. Kazuma from Konosuba behaved more believably. I just can't fathom how annoying and stupid the MC is, I hate him with passion.
The main objective is to gather 5 rings and 5 wives to defeat the evil guy, so it's your typical harem isekai but executed in a laughably bad way. Every character is dumb to the core. MC gets power from the rings, and to do so he must build up his relationships with his wives. He does not do that. They don't really have any deep conversations about themselves, there is no interesting drama around them. The biggest plot point is probably the first wife getting jealous of the others. Also, every girl wants to sleep with our hero, but he refuses like every young man would do, yeah. Not to mention that sleeping with your wives and having any and I say any kind of relationship is directly linked to the power of the rings, you know, that power which is supposed to keep MC alive and defeat the main villain.
I like trash isekai titles to some extent, but this is so bad I couldn't keep reading anymore. It's just a horrible Lord of The Rings fanfic made for incels. Bye.