Romance wa Tsurugi no Kagayaki II

The story of Keith, a young adventurer who falls one night on Princess Elfarcia's balcony. She has lost her precious pendant - The Silver Rainbow - and, thinking him to be an angel, asks him to bring it back to her. So Keith quests for the pendant to gain the trust of the beautiful princess and encounters many dangers, adventures and women along the way.

[From AniDB]