Elusive Gem

Before he losts consciousness, Krist has only one regret. He did not take the risk to pursue his only love. When he woke up, he is in the body of a 'Krist' that lives in a parallel world. The owner of the body has his own regret which is the same with Krist and our protagonist needs to work his ass off to fulfill the last wish of all the Krists he swaps with. The question is, can he catch the same man he failed to confess his feelings to?