Responses
https://www.mangago.zone/read-manga/oboreru_knife/
very mature and just a warning it contains SA
This one actually has a lot of drama and it is kinda dark
https://www.mangago.zone/read-manga/mars_souryo_fuyumi/
I don't know if you'll like it though
Straight romance manga where all the chars are actually mature and have realistic drama and issues. Ps- I've read horimiya but I would prefer a little more drama and not all fluff. Pls rec some to me I'm tired of reading mangas with super immature and girly mcs and asshole mls