This world is overturned in its last one second.

A shy high schooler in Kyoto meets a man claiming to be his future self, who tells him he’s hacked into the past to save their first love.
In Hello World, consciousness is carried by machines — a plane of “virtual Kyoto simulation”. The story fights on E8/E10 of the E0–E14 reality ladder, compressing technology, memory, love, control, identity.