The couple was living happily together, when Yui Tomita's sister-in-law and her husband came to stay for a few days, but the two of them stayed with each other and didn't know how to be polite all day long, and Tomita's lewd sister-in-law kept moaning so that the groom couldn't sleep. had to peep often because his wife couldn't have sex like Tomita.
And then that night, after the brother-in-law had fallen asleep from the exhaustion of the fuck, the brother-in-law sneaked in and fucked the sleeping sister-in-law.