Fetching details from the dictionary...

the front
honest; upright; decent; proper; respectable; straight; serious; sensible
真面に話を聞いてもらえなかった。
They would not listen to me seriously.
彼はようやく真面な職に就いた。
He finally got a decent job.
真面に向き合う覚悟が必要だ。
You need the resolve to face things squarely.