My Bride is a Mermaid

A teen rescues a mermaid, gets forced to wed her, and must dodge yakuza‑styled sea assassins.

When hapless middle‑schooler Nagasumi Michishio takes a solo swim in the Seto Inland Sea, a sudden cramp sends him spiraling toward the abyss. Just as the water claims him, a mermaid named Sun Seto intervenes, pulling him to safety. The next night, Sun reveals a shocking truth: mermaid law demands the death of any human who discovers a mermaid’s true nature. To spare Nagasumi, the yakuza‑run Seto clan forces an impossible bargain—marry Sun or face a swift execution at the hands of her fearsome father, Gouzaburou. Thus begins a slap‑stick, underwater‑flavored romance as the unlikely couple juggles high‑school life, secret wedding vows, and a parade of eccentric foes. From Gouzaburou’s relentless assassination attempts to rival merfolk and over‑the‑top classmates, every episode blends absurd comedy with heartfelt moments. Amid the chaos, Nagasumi and Sun slowly discover that love can thrive even when the tide is against them, turning a bizarre forced marriage into a genuinely sweet partnership.