A lewd stepfather who has retired and is now free to join his wife

Miyu got married and started living with her father-in-law at her husband's family home. However, as my husband became busy with work, he began to constantly fight over trivial matters. At that moment, my husband decided to go on a business trip for a week. Miyu takes this opportunity to come up with a solution to help improve the relationship between the couple, but it's hard to come up with that easy... Unable to see Miyu at a loss, her stepfather tells her the secret to a happy marriage. Miyu is happy, but her father-in-law asks her to massage her breasts instead of teaching her. Miyu is confused and resists, but her stepfather forces her to rub her breasts...