Hae-beom is often misunderstood as a gangster because of his stern look.
Sang-a, a customer who helped Hae-beom once, was a mermaid. Sang-ah needs human saliva to get legs.
Hae- beom selflessly proposes a kiss to Sang-ah, once a day, every day.

“Sang-ah only needs legs… but won’t
Sang-ah like me someday?”