てんたま 2wins

The story takes a couple of years after the original game and the main protagonist is Akira Ichinose, a high-school freshman who is staying at your relatives' place until graduation. The life seemed without any particular problems until one day, out of the blue, twin sisters, Kae and Momi, apprentice angels, no less, crash landed on top of Akira in his room.

[from MobyGames]