It has been a long time since my wife and I returned to our hometown to visit my wife's parents, because they were busy working in the city all day. Now that I'm back, I'm surprised to see that my sister-in-law, Chihiro-chan, has grown up and matured so much, and she's now a young woman. Seeing my sister-in-law every day sad because of her love but still not losing her charm, taking advantage of the opportunity when my wife went out, I couldn't help but sneak my sister-in-law down to fuck her.