Oikawa is a very organized person, so he doesn't keep too much random junk in his pockets.
If he has his iPod in his pocket, he always wraps the headphones around the iPod because tangled headphones drive him crazy. He might also carry around a USB drive for school purposes, but it also holds tons and tons of footage from volleyball games he's studied (and will mostly likely review 12 more times in the near future). He also keeps eye drops around because his eyes are dry and itchy from staying up so late reviewing said volleyball games saved on the USB drive.
Oikawa might also keep some concealer handy, because he has dark circles under his eyes from staying up so late studying. If Iwaizumi notices that he hasn't been getting enough sleep, he wouldn't hear the end of it. He keeps some painkillers on hand because of his knee pain from overworking himself (again).
He has some nail clippers to make sure his nails are short enough and won't interfere with his setting. He also keeps a small notebook on hand or nearby to jot down notes on his team or other teams. Half of it is near illegible because it was written at 2 in the morning.
What does your character have in their pockets/backpack?
If he has his iPod in his pocket, he always wraps the headphones around the iPod because tangled headphones drive him crazy. He might also carry around a USB drive for school purposes, but it also holds tons and tons of footage from volleyball games he's studied (and will mostly likely review 12 more times in the near future). He also keeps eye drops around because his eyes are dry and itchy from staying up so late reviewing said volleyball games saved on the USB drive.
Oikawa might also keep some concealer handy, because he has dark circles under his eyes from staying up so late studying. If Iwaizumi notices that he hasn't been getting enough sleep, he wouldn't hear the end of it. He keeps some painkillers on hand because of his knee pain from overworking himself (again).
He has some nail clippers to make sure his nails are short enough and won't interfere with his setting. He also keeps a small notebook on hand or nearby to jot down notes on his team or other teams. Half of it is near illegible because it was written at 2 in the morning.