The thin man advances one step, she retreats one.
This is the natural instinct of humans facing danger. After retreating a couple of steps, Su Luo finds her back against the wall.
There's nowhere to escape!
She realizes it now.
This man has been hiding his true strength all along, deliberately leading her into this quiet, deserted alley.
She was too confident in her pitiful martial arts abilities - she's been outsmarted so easily!
The man's soft sword is aimed at Su Luo's chest, ready to undo her rosy red placket button. He speak lasciviously. "I've had my eyes on you for a while now. You're quite handsome. Look at this face, look at this figure. Be a good girl, give me a good time and I'll let you go!"
Su Luo stares fixedly at the man.
She won't miss a single detail!
His words and actions are frivolous, but his eyes remain unflappable.