Hey, i m looking for a manhua or you can call ot a webtoon as it in korean. It’s school life, where a boy meets a girl (senior) from his school, which he later comes to know has already died from suicide two or may be four years ago. He meets her every night in his sleep and after knowing about her suicide he wants to know the reason for it and wants to stop it from happening. Later he knows that she died because one of his senior friends and finally prevents her suicide but end up having an accident . Now they both forgot about each other . I forgot the name. Please help me find it.