Confession you don't agree, why are you angry when I change my mind?

Super researcher Su Yiwan returned from traveling through the heavens and worlds, and accidentally transmigrated into the body of a girl who couldn't confess her love.
The original owner is a female cannon fodder in a book of domineering students, a humble licking dog, a stepping stone for the hero and heroine.
Su Yiwan sneered: Oh, this old lady who licks dogs is not appropriate.
As a result, she sealed her heart and locked her love, and when she planned to study hard, complete the tasks of the system, and prolong her life, the male protagonist in the original text who had been ignoring her all the time suddenly changed.
Not only dangled in front of her every day, but also made troubles for no reason.
Su Yiwan:? ? ?
Thank you for the invitation, Feng Xin no longer loves me.
In the end, her legendary fiancé suddenly appeared and asked her to take responsibility.
Su Yiwan: ...
It is impossible to be responsible. She just packed up her money and planned to run away, but she was blocked in the room the next moment. The man smiled alluringly and charmingly, and clasped her waist. His voice was low and sexy: Daughter-in-law, I want to run now , is it too late?

Key words of the novel: You don’t agree to confess, why are you angry when I change my mind?