The manga where protagonist(male) seems like normal student at opening, then suddenly demon girl (named Lucia iirc) comes awaken his power which is his eyes that can make any girls fascinate and goes in ecstasy if they look onto his eyes.

once demon girl Lucia confirms protagonist's power, she hunt him but shortly after angel girl (with sword iirc) comes to save him from demon girl.

that should be around half of first chapter, if anyone know the name of this manga please tell me.

also sorry for my weak English

I searched for demons and angels and two titles stood out with their names.
Princess Lucia
Shishunki na Adam - Evil Eyes

One contains that name the other something about eyes... Maybe one of those?

in need of romance?
uncommon, sad, sweet

It's "Shishunki na Adam - Evil Eyes"

Thank you very much Lorska