Cuckold Method - A Husband Who Asked His Best Friend To Seduce His Wife To Make Sure She Loved Him - Haruka Nagaregawa

His wife Haruka, sleeping next to him, was too beautiful. Years into their marriage, he had never doubted her love. But he could not find a reason why a man like him should remain her one and only. Was she truly in love only with him? Plagued by suspicion, the husband asked his best friend to do something to test her love.