I had always been in love with my childhood friend, Yui Nagase. Yet right before my eyes, I'm watching her having sex with a male college friend of ours on my own bed. What's worse, I'm filming the whole thing, planning to sell the video online for profit. It was supposed to be just simulated sex, avoiding actual intercourse—but in the end, they couldn't hold back and he entered her without a condom. Right in front of me, he came inside her. My bed sheets are now stained with another man's semen. How on earth did it come to this...?