Right now I can only think about:
Koori no Mamono no Monogatari
It is shounen-ai but very light and I think most of it concentrated on plot. It is completed but only half of it is scanlated (12 volumes)

Thx for all the great suggestions 🙂

"Sanity is for the weak"

Asura fits under this category too

I second Hanatsuki Hime. Best demon romance manga ever.

"I love you like the plant that never blooms yet carries in itself the light of hidden flowers.
I love you as certain dark things are to be loved, in secret, between the shadow and the soul" - Sonnet XVII

watashi no ookami-san which is a prequel to Dear Both quite cute mangas 🙂

Kyuuketsu Yuugi - its vampire that all i can say i didn't really like it but you might its ok i think

Megalomania
Spice and wolf

Tenshi Kinryouku : you know this probaly but i think it can fit since that talk about angel but... they have nothing really angelic in them.

I second Spice and wolf
it goes very well with what you describe, I`ve only watched the anime though 🙂

Mittsu no kokoro ga hitotsu ni nareba...
Hitotsu no seigi wa hyakuman pawaa.

• Getter Robo -

i just remembered Yasashii Ryuu no Koroshikata goes with this to, its shounen-ai

Ayakashi Koi Emaki
Black Bird
Karin
Love Monster
Midnight Secretary
Mitsuiro Devil
Vampire Knight

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Kanata Kara

All choices are made in fear,
What you fear more is the only difference.
Positive decisions are made in fear negative consequences,
Negitive decisions are made in fear of positive decisions not giving the outcome you want.
Embarrassment is the fear of people knowing your real thoughts.
Greed is the fear of having too little.

Demonblaze0's personal thoughts

Bump!

Great suggestions 🙂 ,i see most of these have male demons so how about some more demon romance's where its the girl that is a demon? 🙂

"Sanity is for the weak"

Ao no Fuuin - female demon 🙂

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Naoto ♥ Haine