Talk:少女レイ (Shoujo Rei)/@comment-87.20.162.145-20180806182608/@comment-2601:640:C600:31E2:75E6:50B8:7441:4B5D-20180814031733

Not OP, but from what I understand is: Girl B had committed suicide because she was being bullied by other people in her class, and the song is about Girl A/narrator mourning and missing her even though she was the one who caused the death.

Girl A had been the one that started to bully Girl B by secretly placing the vase on B’s desk, and it’s implied that it resulted in the rest of the class bullying B. The reason Girl A had started the bullying because she wanted to be the only one B could turn to to depend on and love.