Crossing the Line is the second story in HIStory 2.
This story is about school, youth, passion, sports, and romance.
Wang Zhen Wu is Wang Zhen Wen's older stepbrother, Zhen Wen likes him, but Zhen Wu can't show his feelings to his younger brother because of them being stepbrothers.
Qiu Zi Xuan was an excellent volleyball player in the past, but he had to give up on his dreams due to his injuries, but he still participates in the volleyball-related training, arranges and helps them to get into training, watching them improve. During the training, he meets a guy, Hsia Yu Hao, a guy with a really bad temper who gets easily infuriated with people that make him angry, but he strives to acquire what he persistently wants to achieve. Zi Xuan thinks he's the one who can reach his dream instead of him. He hopes that Yu Hao can achieve what he couldn't in the past.
- Fandy Fan as Hsia Yu Hao
- Zach Lu as Qiu Zi Xuan
- Meng Lin Yang as Wang Zhen Wen
- Patrick Shih as Wang Zhen Wu/Zhang Li Qin
- Nemi Sumiya as He Xiao Xiao
- Hana Lin as Qiu Qian Ru
- Han Chang as Zeng Zheng Yu
- Yi Hong Xie as He Cheng En