The most generic and bland of the cliche of "I was kicked/quit from my guild party and I'm actually OP as shit plus I have a harem and whatever" manga, with only a spoonful of anything worth reading. But was that being said I'll give credit where credit is due, the art is pretty good.
That was disappointing. I was hoping he'll have a mental breakdowns or reevaluate his life or something. Nope it's was like "Oh snap! But looking back at it, this make a lot more sense."
Imagine dedicating your whole life to be just as smart as the girl that inspire you to become a better/smarter person from words of encouragement, only to find out was from your piece of shit childhood friend, and girl you had a crush for most of your life doesn't even care about you.
You know they always play this trope and Japanese media. I wonder how often does it actually that occur in real life? And they're like someone that tells you that switching time or something?