The reason Yun Hao was willing to bring out this ring to repay the debt was because he had already realized that Romance definitely wanted him to be her bodyguard!
For this kind of thing, Yun Hao was internally opposed; the terrifying Asura being a bodyguard for a young woman? No matter how much money is offered, he couldn't do it. If word got out, it would affect his reputation. Moreover, he didn't want Chu Yan to know his true identity!
"If that's the case, then I'll accept it. Thank you, Mr. Yun, for being so generous!" Romance was also a smart woman. Seeing Yun Hao willing to repay ten times the amount of the 30 million owed, she knew Yun Hao was determined to disagree. Hence, she immediately accepted the Fire Feather Ring and stopped insisting on Yun Hao!