Mission Mermaiden - Hasumi And The Deep Sea Sis... Jun 2026

Mission Mermaiden - Hasumi and the Deep Sea Sisters (also known as The Downfall of Hasumi ) is a 2D side-scrolling released in July 2020.

Hasumi, the protagonist, is an ordinary high school student who finds herself at the center of an extraordinary mission. With her enthusiasm, courage, and determination, she becomes the perfect candidate to join the Deep Sea Sisters as their newest member. Donning a magical mermaid suit, Hasumi transforms into , a powerful and agile heroine capable of withstanding the harsh conditions of the deep sea. Mission Mermaiden - Hasumi and the Deep Sea Sis...

Low-impact restoration tactics

Gades, the primary antagonists of the series, are a ruthless organization driven by a desire to dominate the world's oceans. Led by the enigmatic and cunning , Gades will stop at nothing to achieve their goals, including exploiting marine resources, polluting the ocean, and enslaving marine life. Mission Mermaiden - Hasumi and the Deep Sea

"Mermaiden… the abyss stirs. Find the Sisters before the silence takes everything." Donning a magical mermaid suit, Hasumi transforms into