Hottie night Riiko, I can help you with you're homework.

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Yuki Shirisaki
Yuki Shirisaki
Vital statistics
Title Yuki Shirisaki
Gender Male
Race Japanese
Health Good
Allies Gaku
Enimies Riiko, Night
The pretended brother of Toshiki. Knocks Night out when he whispers a code into his ear at the hotel.
In reality he is the boss of Gaku, and sends out his Nightly 02 model to seduce, and have sex with, Riiko. He wants to see if it is a better model than the Nightly 01 series, and states that whichever model successfully sleeps with Riiko is going to be a finished product, and the one that fails will be disposed of.