Wait u do??
Umm spoil me please!!!
Nike returned to him when he was 18 or 19 or something like that. They were in that grass field in the last episode of the anime. Anyway, he did his best on finding a way of making Nike return to him. Although t took years since after all only Nike can restore the world.
Noo all for that??? What a sad and bad and good ending idk how to describe it ┗( T﹏T )┛
... Although I know the ending... THis is making me cry! Waaaahhhh!!