The stain was on the back of Su Zhinian's shirt. Even though Song Qingchun didn't witness how the lipstick stain was placed there in person, she could guess the woman did so when Su Zhinian wasn't paying attention.
She could pretend to not notice in the beginning, but if the woman wanted to instigate something, she was down for it.
Most importantly, she dared to sneakily drop a kiss on her man! Had she given her that permission?
Given an inch and take a mile‽
Song Qingchun had flared up instantly. She had grabbed the nearest pair of scissors to cut the shirt into pieces before throwing it into the dustbin. That was when she had decided to make a trip to ST Empire, to meet this other woman!