Romance wa Tsurugi no Kagayaki

While resting one evening, the adventurer Keith finds himself on the balcony of Princess Elfarcia. The princess has misplaced her valuable pendant, known as The Silver Rainbow. Mistaking Keith for a celestial being, she requests his aid in recovering it. In an effort to earn the princess's confidence, Keith embarks on a journey to retrieve the item. His travels involve numerous perils, various escapades, and encounters with several women.