Reborn into the World of Owari no Seraph with a Spirit!

Zephaniah is a Filipino boy who died in a car accident while saving a girl from being run over by a car. And now, he was given a second chance in life by being reborn into the world of one of his favorite anime shows.
He is now known as Atsushi Nakayama. Atsushi Nakayama, however, didn't know that he was reincarnated with a spirit rather than a demon. That spirit's name is Dahon, and he was from the Philippines. But when Atsushi found that out, he had to keep it a secret from Yuichiro and everyone else.
Will he navigate through the post-apocalyptic world? What if Krul Tepes did not die? What if Atsushi falls in love with Krul? These questions will be answered in this fanfiction.
Info:
Name: Zephaniah (Atsushi Nakayama)
Hobbies: studying languages, listening to music, and watching anime and data videos
Age: 17
Personality: Musical, smart in languages, shy, and an introvert
Religion: Christianity
Warning: the cover picture is NOT mine. Credits go to the original creator!