Compete
Stand on your older brother. Now stand on your older brother again. You wish to stand on, and above, your older brother. You compete over and over again, to stand atop your older brother.
Imagine yourself standing on your older brother. They push you off. So you do it again. You want to be on top, but your older brother doesn't want you to. You compete for the top spot over and over again, throughout your whole life, because that's what one does with their older brother.
きょう, けい
きそ
None
You compete with your older brother because only one of you may go to きょうと. Whoever stands on top the most gets to go to きょうと, so you must compete for a spot.
Imagine yourself competing to stand on top of your older brother. Do you win? Do you get the one ticket to きょうと?