DKRA-04202 Condom vs. no-condom challenge project: A close college-age sister and brother take on a taboo-themed mission! If she can’t reach climax during sex with her younger brother, they win 1 million yen! The sister, who could hold back with a condom, lets out a scream and climaxes instantly the moment the condom is removed and they switch to direct contact. As the sensation intensifies, she clings to her brother and keeps going for repeated finishes. Kazuha

We invited a pair of ordinary college student siblings we approached on the street into the studio under the pretense of a relationship survey. In a private room for just the two of them, they took on a daring challenge for a large cash prize: intimate contact, then protected intercourse, and finally unprotected intercourse, in that order. If the older sister did not climax by the end, they would win the prize. During the protected stage, the sister still seemed composed and even wore a relaxed smile, but once unprotected intercourse began, she was overwhelmed by the intense sensations and became completely captivated. Please enjoy this forbidden, behind-the-scenes account of a college woman who never imagined she could feel so strongly with her brother, yet ended up genuinely aroused and reaching climax. Starring Kazuha. This work contains the same content as part of DVDMS-088.