Arisa (アリサ) is a manga series written and illustrated by Natsumi Ando. It appeared as a serial in the monthly manga magazine Nakayoshi from the February 2009 issue to the September 2012 issue. Kodansha published the chapters in twelve bound volumes, from April 2009 to September 2012.
Del Rey licensed the series for an English-language translation in North America. It published the first volume in October 2010, and shortly afterward, Kodansha Comics USA took over publishing, with the final volume published in January 2014.
Set in modern-day Japan, the plot centers on Tsubasa Uehara and Arisa Sonoda, twin sisters separated by their parents' divorce who keep in contact through letters. Finally meeting again as teenagers three years later, tomboyish Tsubasa is envious, but proud, of her popular sister, in comparison to her own school life where she is often referred to as the "Demon Princess." When Arisa receives a letter from her school denouncing her as a traitor, she attempts suicide and becomes comatose. Shocked and saddened, Tsubasa poses as her, attending her school to find out why she tried to kill herself. She learns that Arisa's class sends wishes on their cellphones to a person called King each Friday. The King only grants one wish weekly, resulting mostly in violence. Tsubasa resolves to stop the King and find out the person's identity to save Arisa, in the hopes of waking her from her coma.