Tree by the Roadside

On the night of Chinese Valentine's, Gu Jun and Wu Siyu left behind many beautiful memories. 

But the next morning, the call came. Inside the suite, they were briefed about the latest bad news. An abnormal Tourette Syndrome was affecting young girls across the country. It had an unknown transmission method but all recorded patients so far were located around Eastern State. Thus far, there were 75 registered patients and they all called out the name, Gu Jun. On the other hand, Kedou did not show further symptoms. It was hard to tell if there was any connection. Could this be the 'small new year present' meant by Gu Jun's big sister? Gu Jun boiled from anger as headache threatened to split his head. 'Who is this big sister…?'