First Cum, First Served

My classmate Mayumi is tall, stylish, athletic, and the star of our volleyball team. After crushing on her for ages, I finally worked up the courage to ask her out. She told me she'd need a little time to get back to me... and then sent me a video of her having sex with some creepy old guy! She and her boyfriend both liked having me watch them, and she promised to send me more videos if I kept their relationship a secret. I'm getting to see a side of her that nobody else knows about—but will my heart (and my cock) be able to handle the strain?

Official Translations:
English (Irodori Comics, FAKKU), T.Chinese