Who is that man?
I have a plan to go play pachinko with my guy friend.
I developed quite a rapport with a man I didn't know at a fireworks show.
The kanji and the word are exactly the same. That means they share meanings as well.
Since this word is made up of a single kanji, it uses the kun'yomi reading. Here's a mnemonic to help you to remember it:
There is a man. Think of the manliest man you can. He works in an auto shop. As a child, he was an auto 子 (おとこ), working at the auto shop from an early age. This turned him into a man very quickly.
Like other mnemonics that aren't lined up quite perfectly, your goal here is to get close enough to remember the true reading. Step, step, step, jump!