A law-abiding undergarment

Childish marital relationship. His wife, aika, was making loneliness. The skin and the plum that becomes slack as it rides without the night with the husband. Straightening underwear to sneak... One day, the younger brother of the husband who is away from the year is seen underwear. The younger brother who cannot suppress excitement in the obscene appearance of a brother. Two people who are drowned in forbidden act while knowing the relation not permitted.