Riiko Izawa has never had a boyfriend and she has been rejected by every boy she has ever had a crush on. When she returns a lost cell phone to an oddly dressed salesman, she mentions wanting a boyfriend so to thank her, he directs her to his company's website, Kronos Heaven. When she visits the site, Riiko finds it's a site to create your own lover. Thinking its a game, she customizes and accidentally orders one. The next day, her new lover arrives. Following the instruction manual, she kisses him to wake him up and configure him to be in love with only her. She names him "Night " After a few weeks she is soon caught in a love triangle between Night and her childhood friend Soshi, who declares his love for her out of fear he will lose her.