X-Dragon Era
Xin Yun, a sarcastic young man, traveled to an unknown world by chance, but lost his chance to become the strongest because of his obsession with women... or sex. In a collision of the powers of nine powerful men, an incredible thing happened. Xin Yun was reborn back to the time when he traveled to the Isekai world. A fantasy journey is about to begin... 【The comic adapted from this novel is popular all over the world】
Chapter 113-114: The Worst Class 3
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However, this kind of challenge is not something that can be undertaken at any time. According to the academy's regulations, no challenges are allowed during the first year. After the first year, a student may only issue a challenge once a month, and they must challenge in ascending order without skipping any levels.
Not only that, once the challenger defeats the challenged, the defeated has a week to retaliate. During this week, they can initiate a challenge every day, totaling seven challenges. If they win any one of these, then the challenger's attempt is considered a failure.
That is to say, to successfully challenge the next level, one must continuously defeat the opponent eight times if the challenged does not accept their defeat. In these eight matches, even a single loss is seen as a failure.