Rejected way too many times by good-looking (and unattainable) guys, shy Riiko Izawa goes online and signs up for a free trial of a mysterious Nightly Lover 'figure'. The very next day, a cute naked guy is delivered to her door, and he wants to be her boyfriend!

Another woman has kissed Night, reinitializing his system to accept her as his new girlfriend. Riiko hunts down the apartment where Night is staying with his new lady, frantic to find him before he is fully 'imprinted' and she lose her chance with him forever.