All Out!! (オールアウト!! Ōru Auto!!) is a Japanese manga series written and illustrated by AMASE Shiori.
The day of the entrance ceremony at Kanagawa Highschool... The story starts when the slight but unyielding Gion joins the rugby team. His classmate, Iwashimizu, who can’t get into rugby because of something happening in the past, the vice-captain, Hachioji, who looks out for all of the members, and their captain, Sekizan, who is more passionate and intense than anyone... All of the members are completely different, but they all keep growing on this battlefield known as youth. Once they give it their all, the ultimate stage awaits them!