The terms in your query appear to pull from several unrelated subjects: Zhenya (Character):

Extra protection at the toes and heels to prevent "runs" during school hours. Styling Like Zhenya: Modern Aesthetics

When do you think was the moment Taekjoo fell in love with Zhenya?

: The denier (thickness) of pantyhose or tights can vary. Higher denier usually means thicker and more opaque, which can be preferred for colder weather or for modesty.