Rakka Ryūsui(落花流水) is an on-going Japanese 4koma seinen manga written and illustrated by Ikki Sanada. The manga began beening serialized in Manga Time Kirara Max in 2006, four bound volume have published by Houbunsha to date. The main character is Akiho Hayama, and the story is about her days at the kyūdō club at Sakuraba Girls' High School(桜庭女子高校Sakurabajoshikōkō), an all-girls school.