Odayaka Kizoku no Kyuuka no Susume.

This is a story about a young man named Lizel, 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!
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Author's note: The protagonist forges many male friendships where deep camaraderie is present, so much so that it is necessary I assert there are no romantic feelings involved and therefore not BL.