Games like Omega no Shikai 1. Shiki no Hajimari

If you finished Omega no Shikai 1. Shiki no Hajimari, the closest matches are Neotrogla, Rosetta, Apathy Hayarigami, Gakkoi: Ai to Noroi to Valentine and Hansel and Gretel DS. All 6 share its visual novel genre and are ranked by how closely their themes and modes overlap.