Waka misono - 大奶子妻子给她的丈夫戴绿帽子

A junior student who has "no money, no wife, and no job" comes to his senior for help. Waka is a kind married woman who cares for him. However, her kindness turns out to be a curse, and a one-time mistake ruins her life. At first "Waka" feels guilty, but she gradually awakens to the pleasures of her junior's big cock and sex techniques.