Why does Sora no otoshimono have different ending themes per episode?


I've finished watching the Anime's First Season and I noticed that every
episode in the anime has different ending themes.

As you can see in this [list of
episodes](https://en.wikipedia.org/wiki/List_of_Heaven%27s_Lost_Property_episodes).
Heaven's lost property has different ending sequences and different ending
themes for a 12-episode series anime. Is there a significant reason for this?




It has different endings because they are after scenes for each respective
episode and shows what is happening after each episodes misadventure.

