Another Regular Reincarnation ARR

Fynn Kobayashi used to be a noble boy. He had a soft-spot for helping people in need or jumping to action to save someone from a crime.
One day he saw a little girl crossing the street while her mother talked to someone over the phone. When he heard the trucks claxon, he jumped straight to the girl and pushed her. Unluckily. he got hit. But what destiny awaits a kid with such a good karma?

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I write this story because I love reading those huge crossovers between many animes. I am going to use my own set-up for it, but the characters are going to be the same... mostly.