There is not a good end from what I can tell.
Girl goes to hell for summoning demons to get personal revenge -probably on her little sister-; there she is hunted by all sorts of monsters who are out to kill her. There is no death in hell so she is revived each time she is killed. She then meets a demon who tries to help her.in the end, she overcomes all challenges - then she meets the demon who was helping her again. He is the demon she tried summoning in the very beggining. After she defeats him -or her- it revealed there is no escape from hell. She then gets teleported to another part of the dungeon and goes mad. +what is written earlier