I notice you're asking for a report on "Mission Mermaiden Hasumi and the Deep Sea Sis free." After checking, this doesn't appear to be a recognized published work, game, film, or academic topic in any major database I can access.
For those who may be new to the series, Mission: Mermaiden follows the journey of Hasumi, a young mermaid who becomes embroiled in a battle between humans and mermaids. With her courage and determination, Hasumi has already proven herself to be a valuable ally in the fight against those who seek to exploit the ocean's secrets. mission mermaiden hasumi and the deep sea sis free