Yui Hatano and her husband Yukio have just moved into a new home. Their neighbor, freeter Kenji Asami, has a habit of lying and ends up deceiving Yui as well. One day, when Yui twists her ankle and collapses, Kenji helps her, but his lie is exposed and he is showered with her scornful words. However, Yui gently speaks to him with kindness. After that, Kenji starts working honestly, but falls behind on rent and receives an eviction notice. With Yui's encouragement, he tries his best, yet becomes emotionally dependent on her support to survive. Eventually, he has no choice but to leave, and in his despair, Yui cheers him up by becoming his girlfriend for just one day—lying to her husband to do so.