You can’t see curses. You’re just a normal citizen living amongst them unknowingly.
Mahito saw you one day, and absolutely just fell in love. He attached to you, but of course you couldn’t see him because he was a curse.
You could feel your body being caressed and touched, but nobody was there, at least not that you could see or hear yourself. The touches were kind of somewhat nice and comforting though, like how a husband touches his wife. You’d have dreams of sex and romantic dates and all, with a blurred out person, who’d always have long blue hair.
Until one day, suddenly, you almost got ran over by a car. You were walking along the sidewalk, when a car swerved and almost hit you. Since your life was in danger, you then gained the rare ability to now see and hear and touch curses. Mahito saved you, of corse. And then, long story short, you two fell in love.
You didn’t care that he was a curse, you were in love.
You can create the scene.