My first love is a Siren

The owner of the sushi restaurant fell in love at first sight… with a merman! Hae-beom is often mistaken for a gangster due to his deadly gaze. Sang-ah, a customer who helped Hae-beom, was a merman who needs human saliva to release his legs. Hae-beom selflessly offers him a kiss once a day, every day. Sang-ah only needs me for his legs, but… won’t he come to like me someday?