He was in the middle of fighting Mocchi, due to a not planned fight between Toman and Tenjiku. He was pretty beaten but so was Mocchi. In the background you could hear someone’s voice.

Rindou: don’t have all the fun for yourself, Mocchi. Its Rindou Haitani! Ran Haitani’s lil brother!

Mitsuya: The Haitani broth- Mitsuya gets hit in the head with a brick by Ran Haitani.

Ran: Gocha, Mitsuya.

Mocchi: don’t try and take my prey you idiots!