For a while now i realized that I'm obsessing with Seinen romance manga like <Oshi no ko>, <Kuzu no Honkai>,<Dear Sacchan>,<Dog and scum> even though i started from Shoujo,and Rom-Com genre. So far, i find this two author a underrated one, they deep meanings coming out from these mangas is great, and so i was wondering if you guys have any recommendations like this ones, that's all. ty!(◍•ᴗ•◍)

For "dark romance", you have:
Asper Kanojo: https://www.mangaupdates.com/series.html?id=149321
Sugar Dark (a bit more fantasy): https://www.mangaupdates.com/series.html?id=52985

In a way, Kaguya-sama can be dark (but it is mostly hilarious): https://www.mangaupdates.com/series.html?page=2&id=121 872

I haven't read it, but Soredemo Boku wa Kimi ga Suki is, according to friends, quite dramatic: https://www.mangaupdates.com/series.html?id=105940

Those are what come to thought at first...

Tysm!!! I'll check it later😊