"Amanchu!" is a Japanese manga series written and illustrated by Masumune Shirow. It follows the story of Pikari, a cheerful high school girl who discovers her passion for diving. She befriends Teko, a shy and introverted girl, and together they explore the underwater world while forming a close bond. The manga is known for its beautiful artwork and calming themes, emphasizing friendship, adventure, and the beauty of nature. It has been serialized in Monthly Action magazine since 2010 and has inspired an anime adaptation, further expanding its popularity among fans of slice-of-life and adventure genres.