She is very aggressive and kicks the player and other characters during the storyline. While she hides this fact, the people around her have more or less sensed it (normal humans don't exactly eat batteries) but does not reveal it. Her real identity is Prototype #1 of a Communication-purpose-oid created by professor Shinohara. She has a super crush on Kazuki, and gets very 'watchful' when any girls are around Kazuki. She is a very bright and energetic girl, and calls Kazuki 'Oniichan' (cute form of 'older brother'). She likes dancing and moves around a lot during the storyline. Hiyo is a short haired brunette girl with blue eyes. She's attracted to Kazuki, but is afraid to disrupt their current relationship. While she is very good at domestic matters, she's very forgetful and she loves cats. Her mother died while giving birth to her, and Kazuki's mother has been taking care of her. Yume is Kazuki's classmate and childhood friend. His family belongs to an ancient clan of the island, though he has little interest in said matters.

His mother died in a major island-wide disaster when he was little, but he doesn't have memories from that far back. He has recently returned to the place of his birth, Kimikage Island, and transferred into Himeyuri Academy. The game also allows the player to lock specific sexual positions and camera style by left clicking on their respective menus. But unlike Rapelay, during foreplay this game requires players to drag their desired options into boxes which determines how the female character can be positioned. The user interface is similar to the one of Rapelay where the player can select multiple sex options from a menu by right clicking and the player can also remove the clothing of a female character in the same manner. Each sex position has a different point value. Points are attained through sex and is determined by a multiplier and the sex number of different positions the player used. The clothes the player can purchase is determined by points and by his history with the character. Unlike previous Illusion games, this game has a point system for the player to purchase clothes. After the player gets through a storymode of one of the characters, the sex options for that character will be playable and the player will be able to choose his location and the characters dressing options. In the storymode the player is limited to only clicking to get to the next scenes, similar to the gameplay of interactive fiction games. There is a story mode for each of the 5 female character which the player must go through. There is also an overall story the player can go through to get a sense of the background. The player can choose from 5 female characters to play and from the character he chose he is able to choose to have another character interact, the story or sex styles, the setting, and how the character is dressed.

School mate 2 gameplay