The Coach by S.H. Azanon

Falling for a straight guy is never a good idea—especially when he’s your ruthless, married coach.

Wrestling is hard enough for Tyler without the distraction of Blake, the team’s hard-ass new coach. Blake is infuriating, impossible to please, and, unfortunately, the hottest man Tyler has ever seen. Too bad he can’t stand him.
For Blake, this job was supposed to be a fresh start. He’s here to rebuild his life, not to be challenged by a cocky, insufferable athlete who pushes all his buttons. There’s just something about Tyler that makes him lose all self-control.
They clash. They push. They swear they hate each other.
But hate has a way of igniting into something else, something neither of them is ready for. And once the line is crossed, walking away won’t be so easy.

This is the second entry in the Straight Men series, but each story can be read as a stand-alone with no cliffhangers. Themes include age gap, first time, bi awakening, straight-to-gay, and gay-for-you (with some superhero references sprinkled throughout).