Looking for a Japanese manga where the MC is thought to be a "useless" third son of a wealthy family, and has with him a mysterious young boy servant who is revealed to be a genius forger. They are going on what they call an "educational trip" but all of society derides them as it just looks like an excuse for a gourmet food tour. They are followed by a guy who is very popular within society who becomes intruiged by the MC and his servant.

Set in a vaguely historical, England-esque world.

Thank you!

[BOYS OVER ACTING]