To Sir, with Love

Tian found out that Jiu is Mr. Ma's subordinate. Heartbroken, he went home. Jiu sneaked into Song's manor to bring Tian back. On his way out, Jiu got poisoned by madam Li. Then she tried to kill Yang to keep Tian's secret safe.

Mr. Song ordered his men to search for Tian. Dr. Qi made the antidote for Jia's poison and planned to go back to Song's manor. But madam Li intercepted him. Tian tried to contact his home to let his family know that he's safe.

Madam Li's plan backfired because Yang and Jiu came to rescue Tian and Lady Pin. Jiu took Tian away from the manor to live together. Yang thought that Jiu kidnapped Tian for Mr. Ma. He found out his mother's involvement with Mr. Ma.

Tian and Yang successfully helped Lady Pin selling some of her family land to pay her debt. Mr. Song asked Xiao Tong to investigate Jiu's background. Madam Li and Jia proceeded with their plan to make Tian sleep with Lady Pin.

Tian encouraged Yang to pursue Lady Pin's love, despite his engagement to her. Jiu got jealous of Lady Pin. Realizing Tian's feelings for Jiu, madam Li plotted with Jia to trick Tian and Lady Pin into sleeping together.

Yang refused to reveal Tian's secret despite his father's pressure. Mr. Ma ordered Jiu to infiltrate Song's manor, which paved a way for Jiu and Tian's romance to bloom even further. Dr. Qi decided to help Mr. Song's investigation

The Song family went on a trip to Chonburi to celebrate Tian's engagement. Bua and Yang took this opportunity to find Dr. Qi, hoping to solve Zhang's murder. Mr. Ma ordered Jiu to assassinate Mr. Song's eldest son with Chan's help.

Mr. Ma tried to unveil Zhang's murder by setting up a fake witness. But it backfired because Tian and Yang uncovered his shady business deals. Yang and Bua's investigated Zhang's murder out of their suspicion that madam Li killed Zhang.

Tian realized his mother's involvement in Zhang's murder. He encouraged Lady Pin to fight for her true love and find another way to pay her family's debt to his mother. Tian grew closer to Jiu's siblings, despite his incessant rejection.

Li ordered Jia to kill Zhang in order to protect Tian. Chan was convinced that Li murdered Zhang and reported her to Mr. Song, but it backfired. So she plotted with Mr. Ma to prove it. Tian grew closer to Jiu, despite his rejection.

Li wish for Tian to get close to Lady Pin, but he realized Yang's attraction to her. Tian met Jiu again, which made Yang realized that his brother's gay. Zhang accidentally heard of Tian's secret and intended to blackmail madam Li.

Despite of their mothers' rivalry, Tian and Yang grew up to be close step sibling. Tian became the mature and responsible son while Yang stayed free-spirited and carefree.

At the 5 Dragons' meeting, Ma revealed Zhang's secret to the other leaders which is considered a disgrace. Which made Li worry about her son's future when she learned that he has the same affliction.