When his wife, Takako, became pregnant, his mother-in-law, Mika, came to Tokyo from her parents' home. She helps with housework such as cooking and laundry, but our relationship deteriorates day by day, and one day she even orders me to refrain from masturbation. 1 day, 2 days, 1 week...Mika-san couldn't bear to see me suffer, so I wasn't forbidden to do anything to her with my hands, right? She gently touched her crotch. Ever since that day, my head has been filled with Mika-san, and one day, I felt lustful for Mika-san's butt while she was cleaning it...