Yuusuke Endou is the heir to the Endou clan which is connected to monkeys. He was sent by his father to steal Momoko Kuzuryu away from Inuzuka and he almost succeds, only to be intefered by Koushi Inuzuka's rematch. They fight for several minutes with both sides taking heavy damage until Koushi used the technique  Myriad Seal to take away all of Yuusuke's abilities. WIth his ablilties gone he could no longer fight giving Koushi the win.