HIStory2: Crossing the Line - Season 1 (2018)

The manager of the school's volleyball team Qiu Zi Xuan and his friend and captain He Cheng Hen try to recruit newly-transferred freshman student Xia Yu Hao after discovering his effortless high jump. Regardless of his countless refusals, their desperate insistence of making it to nationals on their last school year end up successful after their coach and Xia Yu Hao's homeroom teacher orders him to join the team.

Yu Hao takes interest in Zi Xuan after he shields him from some thugs who were attacking him and discovers Zi Xuan's injury is much serious than he previously thought. Slowly captivated by volley, Yu Hao starts a special, tough training coached by Zi Xuan, which inevitably arouses jeaolusy among some of the team members.

As Yu Hao spends more time training, his feelings start growing, both for volley and Zi Xuan. Chen Jia Jun's jealousy causes Wang Zhen Wu and and Wang Zhen Wen to join the team. Zi Xuan's sister Qiu Xian Ru finds out her crush Xia Yu Hao is her brother's friend.

Zi Xuan and Yu Hao find themselves in a uncomfortable situation when Qian Ru asks her brother for an impossible favor. The school approves of a trip for the volleyball team; however, anxiety arises in Yu Hao when he finds out the trip will be cancelled if any of the members fail any subject.

Zhen When tells Zi Xuan and Yu Hao about his feelings for Zhen Wu, giving Yu Hao the perfect excuse to test the waters for his possible feelings about dating men. As the exam day arrives, the anxious volleyball team members hope to be able to go on the trip.

As Yu Hao realizes what exactly his feelings for Zi Xuan are, he's unable to hold them back and coffess them to him. Meanwhile, the volleyball team prepares for their friendly match against the Renhe High School.

Chen Jia Jun is switched with Yu Hao after he burst against the twins. Yu Hao and Zi Xuan agree that he will think about Yu Hao's confession if they win the match. Yu Hao gets injured and is forced to withdraw from the field.

Zi Xuan is still avoiding Yu Hao. Unlucky to him, Qian Ru asks him to set her up with Yu Hao so she can confess to him. Zi Xuan finds himself at a crossroads, trying not to hurt any of the two people he loves the most and failing both of them.