The main pairing was actually surprisingly sweet but the constant introduction of new people who were bizarrely interested in the main character and just about everything to do with his brother was whack and gross.  Thankfully if you ignore all of that, the story has it's moments.  It was definitely an interesting concept to give the main character the ability to see people's thoughts/feelings as actual words and the fact that collected the ones that made him feel good was a really sweet and nice touch.  
Also, yo, they skate over the male lead's role within the mafia quite a lot.  Most of the time you see him, it's when he's interacting with the main character.  He's supposedly quite high up there and quite powerful and feared, but the only time it's demonstrated is when he's saving the mc from trouble.
Overall, I won't say it's my favorite thing I've ever read and definitely some content warnings to go with it, but I enjoyed the main pairing's relationship.