
From the comments it obviously shows you don't even understand what you're reading.
the 4th Mugo is the one who gave the MC the key to not be eaten, it wasn't glasses Mugo. Glasses Mugo is in favor of eating sacrifices, Mean Mugo just goes along with it and 4th Mugo stopped them from eating this one by telling MC to bring Glasses Mugo something sweet. That's why Glasses Mugo saved him.
Also the sex scenes are what contains most details about the personality of each mugo's
Perhaps if the plot is too complex for you you should indeed drop because Lord Mugo will not be protecting anyone and you will be disappointed because you don't understand the plot.
I say this with the utmost pride in my heart and I believe I speak for everyone when I say
YES, PLEASE K#LL THAT MOTHERFUCKER ヽ(`Д´)ノ
(╯°Д °)╯╧╧ (︶︿︶)=凸