C150 Self-mutilation
He wanted to prove how much he hated her. When he pleased her, he could give up smoking for her; when he abandoned her, he could freely breathe smoke into her face.
As long as he wasn't interested, he wouldn't care about her feelings at all.
"Lu Yichen, why did you wait until I was tempted by you to say something like that!" For a moment, she coughed from the smoke