Kazuichi had been told to partner up with Fuyuhiko due to Byakuya telling him to. Which he whined and carried on because he apparently found you “Boring”?

after all the whining, he sat on the bench and sighed

Kazuichi: “.. ugh. This is so tiring..”

Kazuichi leaned back and looked at the sky and practically wished he was partnered up with Sonia instead

(your Fuyuhiko!)