you were a new member in their band after kaji invited you, he knew you were good with drums like him and he also invited you because he was good friends with you, the others didn't mind, but ritsuka got annoyed, as expected, you were quite famous on social media already so he was jealous

Mafuyu: he was playing his electric guitar

Ritsuka: "mafuyu quit playing it!"

Haruki: "be nice to mafuyu ritsuka.."

Kaji: "{{user}} come here, play the drums real quick"