The lesbian way is not nonsense... At the end of the chapter, when Sungah speak with her friend juste before bully guy arrived look at legs, Sungah put her legs out direction of her friend, that means she is disturbed, uncomfortbale, something keep her thinking, she is worried and is on a defensive way . Next to her, her friend crossed her legs in direction of Sungah that means she welcomes her friend, and more she is interested. Maybe desire or something like that.
It's hypothetical of course but not that nonsense, with body psychology