Levo : 「勉強しすぎでお疲れ気味なんじゃない？」

= Benkou shisugi de otsukare gimi nanjanai?

= Aren’t you a little tired ’cause you studied too much?

Nao : 「無理しがちだから手を抜いてやればいいんだよ。」

= Muri shigachi dakara te wo nuite yareba iindayo.

= I know you tend to work too hard. You should just take it easy.