One day, Fuji Shusuke suddenly received an invitation from a girl who called herself "Yuki Fuji", entered a certain game, and asked to conquer Yukimura Seiichi...
"Hello, welcome to the White Valentine's Day strategy game. I am the system elf, Xiaomei. In this game, I will guide you until you conquer Yukimura Seiichi on White Day. As a reminder, this game has many bugs, so please don't mind."