Actually more cold and distance than i imagine when i re-read it in EN version. Like we see their fool around and have sex, and Brett seem care about Hayden alot but he can casually stop contact Hayden for month (and go on). The same with Hayden, he not even respond to Brett’s messages or even tried to go see Brett first until the one time in ch.17.
That how their relationship actually are, just for rut and sex. When Brett done “paying” Hayden for satisfied him, he can just ignore him until Hayden’s rut came. Hayden can’t really do anything for their relationship (for now i guess), he did come to see Brett in next chapter just to get disappointed by himself and tried to spend his rut alone. Let be real here, Brett completely take the lead and is the one have more control in this relationship if he got bored of Hayden this relationship is done.
I love Hayden but i do wish he have more control in their relationship. I hope the ending of ss1 is starting point.