Original doujinshi From Yurikai.com:
A very cute doujin from the author of Hidamari Sketch that tells the story of two furry-eared youngsters and their trip to a flowering tree (the type of tree is Yusuraume, sometimes Mountain Cherry). The characters in this story are young and have an ambiguous gender, but it's one that is substantially more feminine than masculine and considering Aoki's other work, it would be fair to say they are both girls. Many of the panels portray hips on both characters, and both have generally girly eyelashes. You could would make a comparison of the personalities with Aoki's girly Hiro and the more masculine Sae and find similarities as well.