a young man who found that he no longer had a purpose in life could only ask death to take him away as a final wish. what happens when death hears his plea but instead of leaving him dead he was given a purpose in a new life.
So by the title you are a boy who died in his 20s you are then given a chance to live again and you get to choose your ability's (I choose) and you are Arthur brother and all pics and story's belong to there creators not me and ideas as well from other WEBTOONs and manga since I don't anything (AND DON'T READ THIS FANFIC IF YOU DON'T WANT TO GET SPOILED ON FUTURE GOD OF HIGHSCHOOL CHARACTERS IF YOU ONLY WATCHED THE ANIME AND THE SAME APPLIES TO TBATE MANGA, THERE IS LIGHT NOVEL SPOILERS)