This game consists of three separate stories. Two of them, "Katomai" (カトマイ) (doesn't have any H-scenes) and "Sana" (紗菜) side stories, are directly related to Aries. The third one, "Tail Tale", is about furries/kemonos.
Tail Tale's summary:
In a world consisting of floating continents, there exist races of kemonos with different fur colours. One of the races is known as "Mao" (マオ族). At the east and the west edge of the continent, there are two villages- "Bastalk" (バストーク) and "Zarpat" (ザパト) respectively.
The protagonist living in Bastalk, Rick, looks much forward to being able to build an aircraft (there are none in that civilization) in order to explore a new world. On a very day, while Rick is picking herbs for healing his sick younger brother, Nap, he crossed paths with a girl living in Zarpat, Run. And the life of Rick is going to be changed forever after this encounter...
("Tail Tale"'s description was taken from Wikifur)