Ask the World to Die and Help Me Achieve Enlightenment

(Return from the Fairyland + Eastern Fantasy + Decisive Killing + Refusal of Internal Conflict + Do Not Enter Underage) "Fang Yuan! You madman! How dare you sacrifice the entire immortal world to break through the realm? Aren't you afraid that the will of heaven will not tolerate it and you will be doomed!" "Hehehe... You don't understand. Only by stepping into that realm, can I, Fang Yuan, go back to the past..." The first immortal of all time, in order to make up for the regrets of his previous life, he sacrificed himself to the immortal world and returned against the will of heaven. Reborn as a senior in high school. The betrayal of a childhood sweetheart! The tragic death of parents! The conspiracy behind it! Since none of you deserve to live, then all of you should die! … (The introduction is weak, please read the text)