How to evaluate the beautiful sister ending of One-Day Girlfriend?

The man broke up because he didn't give the woman private space. She has always been a sister, but the ending was particularly shocking, that is, two people were so bumpy that they finally lost time.

Finally, there are two ways to call. If the last scene is a flashback, there will only be one blind date (in fact, it is the same person whose sister pretends to be her boyfriend P). If it's a straightforward phone call, it's a notice that the next blind date is a sister pretending to be a sister (then in the plot, the male pp has a sister flower).

introduce

That man is a very rich young master and the most exaggerated young master. He changes girlfriends every day, and few of them are interested. After his father died, he inherited the position of president, and there was still no interested girl until he realized a special girl. This work is a short story, ranging from a few chapters to a dozen or twenty chapters.