I forgot the name of an 아니메 I really wanted to watch. Can 당신 guys please help

Its starts of with a boy with a gray tracksuit and he goes for a run. He can summon a sword with his powers wich he does wile he was running. Also there is this red haired girl wich the most highest points in his school. the boy has the lowest points. They have to stay in the same room together. They also fight wich each other and the boy wins and wins a bet and can do anything he wants with the girl (not a hentai)