I took the liberty of checking out your read bookmarks, if you prefer the darker plotlines, I believe you would enjoy:
Die in my arms
Flashlight
The boundary of delusion
Trick or love
A breathtaking alliance
Night of the unmarked
Roses & champagne
Passion
King's maker
Love jinx
Some that are really interesting!:
The night is soft
The hunter wants to live quietly
Creating a hidden ending
I'm not your guide to destiny
Some similar manga styles to some of the authors you've read - and that I believe you would enjoy their work (check them out):
Hanakoi Tsurane (Doushiyoumo Nai Keredo and Ameiro paradox)
Ashita wa docchi da (Omairi desu yo or Konya mo nemurenai)
XXX allergy (and Therapy Game)
And some honorary mentions by me:
Release your persona
Melting point
Biscuit
You are so lovely
Unsleep
Reincarnated into demon king Evelogia's world
Kiss me liar series (Kiss me if you can, Desire me if you can)
Red string quests
Ikenie monzenbarai
So, who got screwed?
I'm Banging My Rival From A Parallel World!?
Blossoms of the white night
Smyrna & Capri
Everytime i read some bullshit here i think, "i miss them" and start re-reading, i cant do this anymore.
Please gimme some recs. I want something new.