Cheng Hao
Through their lessons and time together Ah Jie starts to uncover the difficult life Kai Qi has had to go through for the past years. Using his reliance and her discovering his real identity, he gets the once isolated Kai Qi to start opening up and warm up to others. However, Ah Jie starts to show his jealous side when Kai Qi resolves her misunderstanding with her estranged college buddy Cheng Hao Wei. He soon realizes that his feelings for Kai Qi has turned from friendship to love. With his one month in Taiwan almost up and sensing Hao Wei actively pursuing Kai Qi, he is torn between telling her how he feels or just leaving Taiwan quietly. Living abroad all these years has also made Ah Jie adjust to life being alone, but for the first time in his life he has formed a bond with someone outside of his family and don't want to lose that feeling. Knowing he can't stay in Taiwan and can't take Kai Qi with him, also not wanting her to end up with Hao Wei, he decides to confess his feelings for her hoping to leave with a lasting memory.