A letter arrives at Koyacho from a man who calls himself Hayama. In the letter, "I have a friend named Kawamoto (pseudonym) who enjoys W affair with his mistress, but he says that he always makes him drink when he has sexual intercourse, so he will not take the affair of the two. Is it? " Immediately after interviewing Kawamoto via Hayama, he easily admits his affair with his mistress "Kana". Then, when he offered to "take a picture of the affair" ... Kawamoto was reluctant at once, but he gradually began to confess his "cuckold desire" and his partner's married woman's "desire for swallowing".
