Madoka's husband is working away from home. She lives with her two sons, Taichi and Yoichi. Taichi is a reliable man, but Yoichi is the second son and has not yet decided on his future career, which worries Madoka. One day, Madoka can't stand to see Yoichi fiddling with his phone without listening to what anyone else is saying, so she confiscates it... That night, Yoichi sneaks into Madoka's bedroom to get his phone back. There, he sees his mother's nighttime face as a woman, different from her daytime face...