The Third Gender

In this story, you are allowed to play as a lot of different characters who live in this world (or outside it), like:

Arthur, an 18 years old boy who is trying to have a comfortable life, while sharing a house with his futanari mother and sisters, also survives the end of high school, a place with dozens of horny futa teachers and bullies.

Lilith, an 18 years old girl who is trying to, both "have fun", as she is stuck on family travel to her aunt's beach house, and also keep her holes intact, since she is the only one in the house who is not a futa.

Erik, an 18 years old boy who lives in a world with dungeons, dragons, and horny-monstrous-futanari. He has the goal to become an adventurer and defeat the futa-queen, who brought darkness to his land.