Shiho gave birth to Yuuki at the age of 20. As Yuuki grew older, she and her husband became sexless, but Shiho's libido only increased. However, one day her husband's infidelity was discovered, and their marital relationship rapidly cooled down. After Yuuki entered university, talks of divorce progressed, and now all that's left is to submit the paperwork. During summer break, when Yuuki returned home, Shiho decided to report this to him before submitting the papers and waited for her son at the station.
