Whose Time Traveler Lost His Horse so Quickly?

[1V1, two female protagonists, a serious OOC young lady vs. A cold-hearted and sinister academic tyrant. As a prospective sophomore exchange student, Ye Xinglin died in a plane crash on her way to the UK. As a result, she traveled into a book... She had a system, but this system didn't seem to urge her to advance the plot. "Aren't you in a system and not in a hurry to develop the plot?" "I am the main system and I was supposed to be on vacation, but your death forced me to continue working..." Okay, what can we do? She and the heroine were in the same university. By coincidence, they were in the same dormitory. Ye Xinglin didn't care about her much. Later, the appearance of the hero really awakened the heroine's "possessiveness", but why did she feel something was wrong? ? ? Xu Qingliu's mother worked as a nanny in Ye Xinglin's family. She was considered the most competent nanny. However, behind the scenes, she must have neglected her care for Xu Qingliu. As a result, even if she was bullied by Ye Xinglin, her mother would only say, "She is the eldest lady, please bear with her." Xu Qingliu originally thought that when she went to college and found a job, she would stay away from this young lady who occasionally had bad tastes. The plan was very good, but within the first week of going to college, she discovered that Ye Xinglin was not the original Ye Xinglin...