While job hunting in Tokyo, I ended up staying with my older brother and his wife. I've always been close to my brother, and even before he got married, I thought his wife was beautiful, kind, and slightly erotic—her occasional panty flashes always left me longing. Living together with her, I couldn't resist the temptation of her panty flashes any longer and finally lost control. Though initially shocked, my sister-in-law quickly became wet, while I naturally got fully erect. Between us, an undeniable tension and excitement steadily grew.