This song fits so well with them. For nagisa his mom wanted him the be the girl she always wanted when he wasn't and was controlling his future and his life Nakamura was so smart that when she got too good grades the other kids weren't friends but when she stoped trying to be smart and got sent to end class Kayano's sister died and she swore herself to revenge but she was left in the dark about koro senseis story Ritsu was created to kill koro sensei only without any freedom And Itona was abandoned on the street when he was picked up by shire but shiro only wanted to use him as a wepond for revenge In the end all the students were kids in the dark but they got together even when the whole school was taunting them assasinated koro sensei.