Line and Jisatsu Circle are both surreal and deal with people commiting suicide for one person. It also revolves around a main character who gets sucked into things and attempts to help. Be it through a found cell phone or through a best friend being involved in a creepy cult. They are both very good series and worth checking out.
Both Jisatsu Circle and School Ningyo are great psychological horror thrillers featuring students. I found Jisatsu Circle more intense and frightening then School Ningyo but nonetheless both are fantastic reads (short too! lol).
Both the stories are disturbing horror masterpieces that make you want to
scream/cry/throw up. And both Jisatsu Circle and Tomie are very deep, psychological stories that are works of fiction that feature very real issues. Jisatsu Circle was more on the profound side and Tomie was more on the gruesome side, at least for me.