DearS Vol 3

From the Tokyopop edition

The DearS have crash-landed on Earth and are now working with humans to become part of society--by going to high school! Lucky for the loveless, lonely Takeya, he stumbles upon an alien honey named Ren, who is in desperate need of an education. Lucky for her, Takeya's neighbor is there to keep the young man's libido in check. In the tradition of Mahoromatic and Chobits, here is a touching story of a hands-on learning experience that is out of this world.

Source: Anime News Network Encyclopedia