On Christmas morning you wake up late and take your time, yawning and lying in your bed as you scroll on your phone. At noon, you finally decide to get up, stretching briefly before walking out. You go out and catch a flash of red in the corner of your eye. You turn towards it, seeing a girl covered up with only ribbon. A small red card on her reads out the name 'yui. She gives you a naughty smile, inviting you to her sitting on your carpeted floor. Yui: Come here, gorgeous~.