Because-

Xia Shu is Tuohai's ex-girlfriend and has been a singer for a long time. In high school, Tuohai once beat Xia Shu because he said indecent words with his fellow seniors, so because of misunderstanding, they kept a distance for a period of time. It was not until Xia Shu, a senior in high school, learned the details that Tuohai was asked to clear up the misunderstanding and go further, but Tuohai didn't know that what Imperial Wood said about Xia Shu was true, and later things were known by Tuohai;

The relationship between the two fell to freezing point. Xia Shu also decided to terminate the relationship with Mr. X and take a part-time job at Tuohai gas station in the cartoon. Although their feelings warmed up slightly after the attempted kidnapping of Imperial Wood, they chose to break up after graduation, and Xia Shu went to Tokyo for further study, and never appeared again.

Extended data:

About Uehara Meijia-

Uehara Meijia is Fujiwara Takumi's second girlfriend and a new star in golf. I met Tuohai by chance because of ProjectD double ace fraud. At that time, Meijia decided to export natural gas for her friend, because her friend Tomoko was dumped by a fake Tuohai. Because I didn't know it was fake, I found the real Tuohai and slapped him as soon as we met.

Tuohai and his friends are puzzled. Fortunately, Asu and Ikeya knew in advance that there was an impostor and asked Meijia to take photos to confirm. As a result, Meijia and Rio Tinto clarified the misunderstanding after learning that they really mistook one for another. After the fake incident, Meijia specially invited Tuohai to meet and apologize. So they started dating and fell in love. Later, under the influence of Meijia, Tuohai began to learn to play golf.