Su Chen transmigrates, but the setting isn't quite what he expected. While others dominate another world, he's trapped on an island in the Koikatsu game, where all he can do each day is interact with the NPCs.
Then one day, a strange chat group pops up:
[Su Chen (Naruto) joined the group chat!]
[Su Chen (JoJo) joined the group chat!]
[Su Chen (Fate) joined the group chat!]
Su Chen: "???"
So he wasn't the only one who got hit by a truck. Fragments of his soul are scattered across the Myriad Worlds. In Konoha, he's an Uchiha struggling on the brink of clan extinction. In JoJo, he's a Joestar bastard about to set off on a journey to Egypt. In Fuyuki, he's even become a Master in the Holy Grail War at the age of six...
And the most carefree version of him has transmigrated to the world of Koikatsu 2.
So the tone of the story starts to change. When the "me" across the Myriad Worlds begin sharing abilities, helping one another with supplies, and spoiling the future, it turns out the strongest cheat is helping myself.