Makoto Shiratori

The main character, who is plagued by insomnia by dreams of a city that does not exist. He is in love with Ai Kurosawa, but had not confessed to her [Spoiler] After interrupting his friend's confession to Ai to confess himself, Ai regains her memories and begs to be taken to Shinjuku before she is decapitated and dismembered [/Spoiler] It is later revealed that (around chapter 40) [Spoiler] an older version of himself (in Earth A) is the creator of the world (Earth B) that he lives in, intended to be a perfect world where Ai is alive and he confessed. [/Spoiler]