It was a lie
Sure enough, after that encounter, Hae-won started avoiding Woo-Bin, claiming him to be a creep. And a relentless Woo-Bin followed after him regardless of how he kept trying to avoid him.
From the cafeteria to the school fields to any other place Woo-Bin was able to go, he followed Hae-won everywhere.
At the end of the week, a tired Hae-won turned to Woo-Bin with anger in his eyes.
"Will you just stop it?" He fired at him.
"Stop what?"
"Stop following me. Stop going everywhere I go and doing everything I do. It's annoying." His outburst was supposed to silence Woo-Bin but surprisingly, he smiled and said,
"I'm not following you." This ticked Hae-won and he turned around to leave. Woo-Bin watched him and chuckled.
Toying with Hae-won was fun.
Even if he said he wasn't following him, he still followed the same route Hae-won was taking while being very obvious about it.