Also khown as:
Odayaka Kizoku no Kyuuka no Susume
A Mild Noble's Vacation Suggestion
Vacation Recommendations by the Nobility
Gentle Noble's Vacation Recommendation
This is a story about a young man named Rizel, the prime minister in a fantasy world who is suddenly transferred to another world. However, with his brains and his unique speech, he partners with a man named Jill and becomes a brilliant adventurer.
Though he doesn't know whether he can return to his own world, Rizel will 'think of this as a vacation to enjoy another world's life'. The laidback adventures of a leisurely aristocrat!
(Source: Endless Journey)