She divorced her husband 10 years ago and has been raising her son on her own. Her son got a job and started living alone, but he wouldn't leave the house. He slept all day, even on his days off. She invited her son to a hot spring trip to get him out. "Masaaki, is there no woman you like?" "Yes, there is... right in front of you..." The reason he couldn't stand on his own was because he loved his mother too much. "Just for today, okay..." To calm her son down, she made a promise to him for one day. The son's love was released into his mother's vagina...