Mr. President stay away

One girl was transmigrated into a novel in which the female supporting character was the wife of the male lead who loves him very much .

However , the male lead was still in love with his first love who left him . He was always cold towards her .

After some time , the female lead returned and they got back together . The female supporting charater was abandoned .

The girl didn't feel good about this ending as it's too unfair for the female supporting charater .

Then somehow she entered into her body .
Then smirked .