
There's funny moments like this: http://www.mangago.zone/read-manga/horimiya/mh/adcd4ddc082427b9/Ch57/pg-24/
Then there's (づ ̄ ³ ̄)づ sht like this: http://www.mangago.zone/read-manga/horimiya/mh/adcd4ddc082427b9/Ch57/pg-29/
Urgggg it's too fcking cute how Miyamura is like part of the family already. It's so natural for him to be in that kotatsu and stuff (● ̄(エ) ̄●)

Cute~ the little seme chasing uke scene was (๑•ㅂ•)و✧
On another note, I don't think the manager was wrong. Yeah, he is dating a man too but you can see the obvious shock/realization when uke and seme were both really determined about their relationship. Kind of like he was shocked that they had the determination when he did not or something like that. He was just concerned for their well being. (⌒▽⌒)

I'm pretty sure he his small crush on Mineyuki also had something to do with it. The way he looked at him did not look entirely platonic. I almost sensed some envy there too.

That would make sense. It's been a while since I've read them so I'm unsure of the timeline in which this all takes place.
...quite frankly I'm disappointed in the uke.