One midsummer day, while I was living a modest and happy life with my wife, her sister, Lisa, ran away from home after a fight with her husband and came to stay with us. We welcomed her in, but Lisa's Kokoro wounds didn't seem to be healing anytime soon. Unable to bear the loneliness, Lisa became desperate and attacked my wife when she wasn't looking. Tormented by guilt towards my wife, I indulged in naughty acts. Pressing our sweaty bodies together, I repeatedly came inside her until I was completely drained...