The Secret of the Wolf Duke [Temple Scans]

Alto is a Duke who after marrying his fiancee Viviana only had boring and dry sex with her in order to hide his "secret". Whoever this caused Viviana to feel lonely and suffer to the point she had to rely on masturbation, which ultimately ends up in her death after a misunderstanding, however she gets the chance to regress and reincarnate in her own body but decides this time around she will never marry Alto in this life. Alto, unaware of her reincarnations, promises to try to do better at sex with the intention of stopping her from acting recklessly and to save their marriage…