The shut-in Yun Chen transmigrated to the Origin Continent, where the supreme treasure Dimensional Pearl recognized him as its master. And so, he got arrogant.
Esdeath stared at Yun Chen. "Aren't you afraid I'll kill you?"
"Afraid? Why should I be? You can't beat me, so what is there to fear?"
Retsu Unohana: "Yun Chen, let's have a match!"
"No. You're too weak."
A reincarnator: "How do you know about the Lord God's space? I can't let you live."
"Tch, come at me if you can!"
Gaia: "Chosen guide to the Origin Continent, tell me, what have you come to our world for?"
"I want to obtain the Five Great Laws. Could you help me?"
Alaya: "All right! I'll give you the strongest Heroic Spirit and hold a Holy Grail War."
(I can't write a synopsis, so this will have to do!!! The main worlds the protagonist visits are Akame ga Kill!, Date A Live, Type-Moon, Gensokyo, Academy City, and so on!!!!)