Yotsuba&! The manga was licensed for English-language distribution by ADV Manga, which released five volumes between 2005 and 2007. Volume six was originally set to release to in February 2008, but was indefinitely delayed. At New York Comic Con 2009, Yen Press announced that it had acquired the North American license for the series; it reprinted the first five volumes with new translations along with volume six in September 2009, and is continuing with later volumes. "Yotsuba&!" is centered on Yotsuba Koiwai, a five-year-old adopted girl who is energetic, cheerful, curious, odd, and quirky—so much so that even her own adopted father calls her strange. She is also initially ignorant about many things that a child her age would be expected to know—among them doorbells, escalators, air conditioners, and even playground swings. This is the premise of humorous stories whereby which she learns about—and frequently misunderstands—everyday things. At the start of the series, Yotsuba and her adoptive father, Yousuke Koiwai, relocate to a new city with the help of Koiwai's best friend, an impressively tall man nicknamed Jumbo. Yotsuba makes a strong impression on the three daughters of the neighboring Ayase family, Asagi, Fuuka, and Ena. Most of her daily activities and misadventures often originate from interactions with these characters. The series has no consistent plot continuity—the focus of the stories is Yotsuba's daily voyage of discovery. Many chapters take place on successive days (for details, see "List of Yotsuba&! chapters"), so that the series follows, almost literally, the characters' daily lives. The tone can be summarized by the motto, used on chapter title pages and advertising: , or in the original translation, "Enjoy Everything". In 1998, Azuma published a one-shot manga and two webcomics called "Try! Try!", in which Yotsuba's father Yousuke Koiwai, Ena, Fūka, and Asagi first appear. Although some of these characters—including Yotsuba herself—are largely the same as in "Yotsuba&!"; Fūka has a different character design, a more mischievous personality, and a different spelling of her given name (in "Try! Try!", it is written with the kanji , meaning "wind-summer"; in "Yotsuba&!", it is , meaning "wind-scent").