An apple a day keeps the doctor away

If Shiro loses, her additional anal forfeit is that she must keep an apple in her asshole from high noon until sunset, and then eat the entire apple the instant it is removed. The apple must be whole, and minimum dimensions are specified to prevent her from finding the smallest apples in the world. On any day that she fails to complete this task, from the moment the task was considered failed that day until midnight, her hands will become her own worst enemies, periodically ripping off her clothing and mercilessly slapping herself in her face, tits, ass and pussy. Any attempt to restrain her from abusing herself will result in the self-**** happening all in a row as soon as she is freed, which would be even more intense and painful.

Sora knows that with stakes this high, there's no way Shiro would agree to the challenge unless she was extremely confident of her victory.

Still, this would be a very very bad time for her to discover that she had overestimated her ability to fit and hold billiard balls in her ass.