The Mermaid Wears a Dress

The Mermaid Wears a Dress summary:

In order to break her marriage contract, the revolting mermaid girl goes ashore to the city, to find her “fiancee” that manages a western-clothes shop, but accidentally releases the seal, on a piece of female clothing, of a monster……. For the sake of subduing the monster, the arrogant mermaid girl and the attractive two-faced brother start a fantastic new life~