Colorful Aquarium: My Little Mermaid

Colorful Aquarium: My Little Mermaid is a PS2 port of a hentai PC game called Colorful Aquarium. PS2 version removes adult content and adds new CG events and features five heroines.
The premise of the story is pretty much the same as in PC version. Your parents are on a business trip and for a while you’ve been living with your older sister. But now that she’s gone as well, you’re left alone in the house, doing the chores and going to school. Your childhood friend, Izumi, is staying with you to help you with chores and such, though the two of you often get into quarrel. One day, a girl with two maids come to your house. While at first you fail to understand why she treats you like she knows you, you soon recognize her as she was another childhood friend of yours you haven’t seen in ages. Now, what felt like living alone will soon turn into living with a bunch of girls, any of them capable of stealing your heart.