I think so too, Seiji felt guilty for biting aiji's neck therefore he forced himself back and consider staying as aiji's mate forever. But then towa showed up, I think it was aiji who found him so he could give the brother a real partner. But they've been doing the incest mate thing for the past 10 years so its kinda hard for them to actually break the bond. but towa is so charming that seiji cant help but fell in love with him. so thats why they start having a fight and shit. I was kinda uncomfortable, i mean cmon, who'd enjoy incest unless you rly have those unique kink.
But in other stories I have seen that when people mate with his alpha they can’t have sex with other people. The alpha can but not the mated omega. Did Aiji- the omega have sex with towa? But in this story it’s possible, but usually the omega will get sick, and get a strong reaction that makes it very uncomfortable to have sex with other, only able to have sex with their mate.
Oioioi wait so Alpha didn't love his twin brother but towa??Was he just feeling guilty?Idk i am hella confused.