【SeaFox】The Sister of the Two-Faced Mermaid

The older sister has a strange disease that turns her into a monster girl like a lamia or a centaur, and she becomes a mermaid.

A little brother does all sorts of lovey-dovey things to relieve his sister’s sexual desires as she gets an erection from her mermaid cock!

A mermaid’s cock is bobbing and bobbing as she comes to life!

It’s the kind of manga that makes you feel like you’re a part of it.