ReaperOnline
Bro, why isn't the author explaining the obvious things right away? like why did the MC take Shinobu with him? and how does the system work? Does he only give rewards? so how will the MC get stronger since not as humans? the author is simply ignoring and posting chapter after chapter without explaining anything
My suggestion: I keep thinking how he will get stronger to the point of rivaling muzan or even surpassing him, a good thing would be him with each demon he defeats, he absorbs his peculiarities like the first demon he killed, even absorbing his magic of blood from the upper and lower moons, and perhaps he will create a breath unique to him based on water breathing and his demonic powers.