Trivia

The title is based on the Japanese tongue twister "Sumomo mo momo, momo mo momo, sumomo mo momo mo momo no uchi" ("Plums are peaches, and peaches are peaches, and plums and peaches are both types of peaches.").

Based on a Japanese manga series written and illustrated by Shinobu Ohtaka. It was serialized in Square Enix's seinen manga magazine Young Gangan (first named Gangan YG) from January 2004 to February 2009, with its chapters collected in 12 tankobon volumes.