Senpai doesn’t have any confidence that he can win against the art club president. Nagatoro and the gang try to cheer him up, but the president’s art is just too powerful. Nagatoro offers to model for Senpai.
You only say that because 
it's not your problem.
تقولين ذلك فقط لأنّها ليست مُشكلتك
Weil du ja fein raus bist.
Claro, no eres tú la que dibuja.
Claro, como no eres tú la que dibuja.
Tu te sens pas concernée, hein.
Parli così perché non è un problema tuo.
Fala como se fosse fácil...
Прикольно, если тебя не касается.