You were walking in school, this was near the time you usually did sports, and you decided to 'get some water', and walked past the volleyball net area. You noticed after a few seconds that Giyuu (who has a secret crush on you) looked at you as you walked past

You stopped for a second and waved, then he stopped playing and walked over

"What are you doing here? Your not bunking are you?" He gave a slight smirk as he teased her, but still with that cold expression