君の事を

about you

→ 君
phrase Rare #30,313
about you 君の事を is used before a verb to indicate that the action concerns or is directed toward you. 君 is an informal or familiar way to say “you,” and 事を can often be translated simply as “you” when you are the object of the verb.
JA: 君の事をもっと知りたい。
EN: I want to know more about you.

君が電話をくれたとき丁度君の事を話していた

We were just talking about you when you called.

君の事を歌ったよう詩だ

It’s a poem that seems to have been written about you.

— さらば、わが愛/覇王別姫 (1993)

今日は君の事を考えていた

Today I was thinking about you.

— ラスト、コーション (2007)

彼女は君の事を知ってるんだ

She knows you.

— Article 15 (2019)

今日は土曜君の事を思ってる誰かわかる

It’s Saturday, and I’m thinking of you. Can you guess who?

— ダーク・プレイス (2015)

警察は君の事を無視すると思うよ

I think the police will ignore you.