Satoko Yoshimura lived a comfortable life with her husband Takashi, a securities worker. One day, Miki, Satoko's best friend, became exhausted from her married life and ran away from home. Takashi welcomed Miki into their home, but was instantly captivated by her alluring figure. However, in front of Satoko, Miki let her guard down, revealing her sensual charm. Takashi, already well-endowed and highly sexed, couldn't help but feel aroused, his crotch swelling with desire. What kind of developments await between these three?