After receiving an SOS from her son who had moved to Tokyo, Reina, the mother, would go to take care of him once a month. However, after going back and forth many times, the affection between family members turned into romantic love, crossing a line that should not be crossed. Having such a rotten relationship is absolutely unacceptable. But now, how can she return to being an ordinary parent and child… Reina's mind flashed with the image of her son leaning on her. As a mother, she couldn't abandon her own child. Reina decided to go back to Tokyo again.
