I just finished the Fighter's Den series by @thefeveredbookaholic and let me tell you that was the best emotional rollercoaster I've ever been on holy cow. I mean seriously that series is amazing!! 1000% recommend reading it omg it's just so perfect.
Essentially it follows the lives of 5 up and coming boxers and their paths to going pro, overcoming their pasts and working through trauma, and finding love. I have to say Wolfe's story (book 5) is definitely my favourite bc omg it was amazing and so unexpected.