A man sleeps with a sexually compatible woman because his marriage has gone dry, earning a furious lecture from his wife’s friend, Yui Kisaragi. Even while being scolded, he cannot stop bragging about his cock. Yui demands to see whether it is really that impressive, but when he says he refuses to show it while soft, she starts stripping. He slips a hand into her panties and fingers her; she admits it feels good and quickly warms to the attention. Her lecture soon turns into passionate sex, giving her the chance to find out just how formidable his cock really is.