From Renta!:

How many more times would I ever matchmake as someone not me? Akira dresses himself in drag to attend a matchmaking date in place of his sister. He tries to blow this setup in any way possible, but Mizuhashi, the candidate in question, just smiles without a word.
"How can this guy be so kind to me...?" Then, startling words come out of Mizuhashi's mouth.
"I... knew all along." What does he mean by this? A pure, yet naughty matchmaking love story of excellent story flow.