MIDA-156 Should I teach you how to massage breasts? The worst me, who got led astray by a meddling how-to on sex from my wife’s Q-cup busty older sister, Himari, and ended up falling for a breast-fondling tease

Himari, who cares deeply about her younger sister, plans to stay overnight at her sister and brother-in-law’s home while sightseeing, hoping to help strengthen their marriage. However, she learns that her sister’s husband is unable to satisfy a woman and is also extremely clumsy when it comes to touching breasts. Worried that the couple’s relationship may be in trouble, the well-meaning Himari decides to teach him how to be more affectionate and improve their intimacy. Under the guise of a how-to lesson, she secretly spends time helping her brother-in-law practice, all in the name of supporting the couple’s marriage.