HORNY FAMILY - Insane Seven Version 0.0.1a Introduction

Overview:
You're a 20 years old geek that were living with your dad and his wife named Caroline, for a long time.
One day, your dad had to left you for a long period, so Caroline is taking you to her old home where you'll meet with her daughters.
Every girls have her own personality, and some secret activities.
With both of caro and you coming to the house, you'll need to get more money to handle the house's life, so you will help them in their activities that are not... usual. (No, they are not selling their body)
Stories and characters are a lot Manga-like, because i'm a manga fan