Ok so this is for Isaac "Zack" Foster of Angels of Death, I completely recommend it. Zack easily stole the spot of my all time favorite anime character. I've never played the games or read the manga so forgive me if I get something wrong.
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So because we don't know for sure at the end if Zack killed Rachel (correct me if I'm wrong but I only found 16 episodes and the ending was somewhat open) so I'm writing this as an "after he keeps his promise" time line, if I'm wrong then consider it an alternative AU. Please check out my one shot book, if you're coming here from there then welcome. Please Remember to follow, vote and comment. Please drop all your scenario ideas here. I won't respond to scenario requests on other pages, just because it makes it hard to keep track of. If you see an idea you like rather than reposting simply comment a "yes" or something that way I can see what everyone wants and prioritize my writing. Zack maybe somewhat out of character, just to make the book a bit more light hearted and funny. There maybe some heavier moments but I'm gonna try to keep this fun. Though I also feel like Rachel may have made a small difference in him at the least, so after killing her I think he may not necessarily "level out" but he'd get a little bit of a better grip on his psychotic breaks.
PS
Only the first couple chapters will be in a "time line" after them it will be free game.