This book IS NOT A YAOI, I repeat NOT YAOI! Also it has some Nationalist tendencies that some will dislike.
A fun and easily understandable story with an interesting and refreshing premise, however I found it very hard to relate with the MC as I found his action and way of thinking to be frighteningly genocidal, like a child pouring boiled water on an ant nest to see what happen. He cares only after the fact something obviously preventable for him occurs and never reflects on it and only blames others for the atrocities he could have prevented considering his smarts and abilities.
I'm fine with MCs that aren't good and/or do bad things but the way he goes about life is very selfish and often times uncaring while thinking himself otherwise. If he at least started of a more humane at start and slowly lost humanity I'd have no complaints and would even praise the story for it's writing, however instead I got a character I found to be nationalistic yet uncaring of the people, at times I even felt him to be hypocritical. Minor spoiler:
Spoiler
I would even be fine with the author saying his though presses changed after possessing cathulu, or that he was sociopathic tendencies, instead of making him out be someone mentally capable and willing to mass murdering a planet if he thinks it necessary for his goals, with no explanation provided.
I also found him to be xenophobic towards other creatures and humans not of his world and also just plain cruel towards animals. I could understand -at times-, but atleast show a tad of hesitation if you are meant to have the faculties of an avarage human male, which was my previous point of discontent.
2 Big-ish spoiler (?) /petpeeve:
Spoiler
The author sould have at least mercy killed the shadow women MC imprisoned after he had no need for them, instead of keeping them in a state worse than death, forever forgotten in his scarf as stones. Even if one of them had killed before and the other attempted to do so, I don't think anyone deserves to be in that state.
I also disliked that he was willing to murder a whole world but the moment someone else did it he suddenly felt he had to kill them, witch he knew that he could do easily and could have done at any time prior to the tragedy happening, but oh well it's fine not like it's his home planet so whatever right. 🤷♂️🙃
But all in all I had fun reading it. I give it a 3.5/5 stars