Blue Files: the Bullet Through Reincarnation

Niyue possesses a special mystery and needs a special bullet to kill himself and start reincarnation at the expense of his own mental and memory damage. However, each reincarnation will have major or minor deviations, which has also led to his many failures. So can he save them this time? The introduction is weak, the writing is not good, it may be a little OOC, and students of color will appear later.