Hayate starts his new job at the cafe Shun's sister Asami runs. But then Asami asks him to help Shun with his studying, seeing that her brother is not making any progress on his own...
Don't be super lame and 
fail anything, all right?
لذا لا تكن سخيفاً جدّاً وتفشل في أيّ شيء، اتّفقنا؟
então não inventa de fazer cagada
e tirar nota baixa, beleza?