
Hazuki’s feelings are valid because we knew that he’s always been insecure about being a father and a great partner for Naoto. But the way he acts in the heat of moment and let his jealousy control his actions are something he needs to work on, not just for naoto’s sake but for also his, since it’s been tainting their relationship a bit of him not wanting Naoto to be talking to other men.
His words could’ve been said in a better way yet he chose those words to express his worries about Naoto but Naoto has always had a complex about his gender and loved Hazuki because he fully accepted him, so him saying those might have been a real shock for Naoto.

I understand that he’s the jealous type but he needs to control himself and watch what he say omg I feel bad
I would’ve broke down if my partner said that to me, it’s like he’s blaming him for the SA So glad naoto stood up for himself. Hopefully in the next chapters they get to work on this issue and for hazuki to get rid off his doubts and insecurity because I do believe that Naoto is never in the wrong of him just trying to give his friends advice :( (i don’t get how some people in the comments are also blaming him in this quarrel)

He literally said it’s something personal and I do believe that not everything has to be said to his mate since the secret wouldn’t even taint their relationship one bit, it’s just a little friends secret. But Ig that’s why hazuki was insecure about it, he thinks he has to know everything that is going on with his mate
I swear if he’s just toying with him imma star a war