Responses
search some mermaid tags. I remember I also read one but don't remember the name
http://www.mangago.me/read-manga/free_dj_shouboushi_to_ningyo_no_hon/
This is the only one i found.
https://mangago.me/tag/Free%20dj/
Im sorry im not of much help. I hope you find it
Funny enough I think that's the one. Thanks so much. I haven't read this one In a while.
All I remember is it's a free genre. It's about haru being a mermaid and makato helping him out eventually having sexual relations.