is a Japanese four-panel manga series written and illustrated by Etsuya Mashima.

began as a manga series written and illustrated by Etsuya Mashima.

It was serialized in Takeshobo's Manga Life Original and Manga Life MOMO from September 2002 to June 2014 and the chapters collected into 10 tankōbon volumes.

The ending theme for episodes 1-13 is "Song of Chitose Get You!!!

no Uta) by Sayaka Nakaya, Sora Tokui and MAKO whilst the ending theme for episodes 14 onwards is "A Thousand Years - Chitose - I Love You" (千年-ちとせ-アイラビュー, Sennen-Chitose-Ai Rabu Yū) by Rikako Yamaguchi and Asaketsu Iizuka.