一歩間違えたら自己嫌悪に負け、枯れ木が折れるようにくじけてしまいそうなこの心と境遇でも。
She hates herself for every mistake she makes, with her heart getting crushed like dry wood.

燃費が悪いって言いたいのお兄ちゃん！？
But consuming fuel is bad for you, Onii-chan!

ここでバイト代もらえるにしろ、早くても来月なんだ。即金じゃないんだよ
Even if you work here, next month is coming soon, so you won't get paid fully.

それに、千波ちゃんって接客業に向いてると思うしね
Besides, I think Chinami is heading down the path of the service industry.

核弾頭の千波は、冷戦というと言葉は悪いが、みんなを仲良くさせる力を持っていると。
Something about Chinami, as a nuclear warhead, would be bad in the cold war, but has the ability to make everyone get along.

せっかくの長所も余りある短所に埋没しているのが我が愚妹なのだった。
My idiot-of-a-sister's strong point is too strong, and is turning into a bad point instead.

教師に専念、という言葉に引っかかりを覚える。
I notice a difference in tone when the manager said "teaching".

なんとも判断しようがない情報だ。
There's nothing backing up this gossip.

過保護なやつはみんなそう言うんだよ
But everyone says you are.

宇宙人がＤＶＤ観てるのかもっ
Maybe he's watching an alien DVD.

展望台に霞でも生えてるだろ
But the mist at the lookout is still living, isn't it?
仙人になるのも千波には荷が重いよ！？
Becoming a mountain spirit is too much too ask of Chinami!

僕は塾に通ってないし、時間もあるからね
Yeah. I don't go coaching, so I have lots of free time.

元顧問の自作なのは本当なんだろう。
Is it really true that the former adviser made this himself?
有名じゃない土産品というのは本当なんだろう。
Is it really a not-so-well-known souvenir like he says?
なら、修理代くらいは目をつむるだろう。
Then maybe it's due to the repair costs?