JUR-683 My plain childhood friend, who used to have a crush on me, had transformed into a sexy, busty married woman, so I had unprotected sex with her until I was completely exhausted... Minamisawa Kaika

Back in my student days, I was incredibly popular with girls, but after becoming a working adult, my close friends all got married one after another and drifted away, leaving me a dull, single man. Then one day, I was approached on the street by a beautiful woman I didn't recognize. That woman was Umika, my classmate and childhood friend who had confessed her feelings to me 10 years ago. There was no trace of the plain girl she used to be; she had evolved into a beautiful, busty, and alluring married woman. That night, Umika, having run away from home after a fight with her husband and with nowhere else to go, came to my house...