Don't know what type of horror your looking for but theses two are really good!
https://www.mangago.zone/read-manga/maria_no_danzai/
https://www.mangago.zone/read-manga/brutal_satsujin_kansatsukan_no_kokuhaku/
1)Averted Gaze R / Broken Gaze R
2)The Heroine Has Despaired / Heroine wa zetsubou shimashita
Emerging is really good
I remember reading that one!. It is indeed really good.
Need some really good horror manga that will probably make me wanna puke no romance is preferd thxxxx