I'm Trapped in a Martial Arts World

When I saw Duan Yu and Zhong Ling about to kiss, I hurriedly called out, “Stop! You two can't be together!” Seeing their astonished expressions, I continued, “You're cousins, or at least members of the same clan within five generations. That makes you close relatives, so you can't marry. Otherwise, there's a very high chance your children will be born with birth defects! The tragedy of Thunderstorm can't happen to you...”