A flash marriage at the beginning, the object is actually a cold and elegant professor

[No system + single female lead + sister-brother relationship + body penetration + marriage first, love later]
Lin Yi traveled to a parallel world where there were more women than men.
Before I even started to enjoy my life, my whole family was urging me to get married and even arranged a blind date for me.
Come on, isn't it too early to get married?
It seems that even if you travel through time, you cannot escape the fate of being urged to get married.
With no other choice, he went on a blind date with this beautiful girl his father had mentioned.
......
Lin Yi would never have thought that his blind date would be her.
Although the two had only met a few times, they still recognized each other.
"Since it's you, let's go get the certificate."
"!!!"
"Isn't it a bit too fast?"
......
As they continued to live together, Lin Yi began to find that he seemed more and more like a younger brother being spoiled by this "sister" who was six years older than him.
"Little guy, come here."
"No."
"Come here, I can't sleep, I want to hold you to sleep."