Complex sentence: He is later seen after Yoochun had defeated him along with the entire student council including Vera, he had unfortunately discovered that Yoochun had learned the "true" Northern Broad Strike and lashed out at Yoochun in rage, only to be defeated once again.
Split into simpler sentences: He is later seen after Yoochun had defeated him along with the entire student council including Vera. He had unfortunately discovered that Yoochun had learned the "true" Northern Broad Strike and lashed out at Yoochun in rage, only to be defeated once again.