
not necessarily, he saw what happens when someone “meets” their soulmate and already feels incredibly strongly about it - when he met his fated pair he already knew about the pull he would feel and hence was prepared enough to resist it. the older brother thought it was a myth until he got hit like a truck with the overwhelming emotion pulling him towards some random guy not the same situation at all and hence it IS unfair. so his feelings of heartbreak is valid and he’s not a terrible person like everyone describes, merely a victim of his biological nature

lol Mas himself says how its a different type of pull, nothing can prepare u for something like that. he couldn't control the pull, but he could control his actions after the initial pull...but he didn't even do that. He IS a bad person and not deserving of the MC...and that's okay to admit lol that's what keeps the story going. He deserves his fate in the sequel where he and mitsurur get divorced and they don't get mentioned except for that small panel showing Masomi doesn't have a love interest anymore. Good, he doesn't deserve it
also pisses me off how everyone hates mitsuru even though he did nothing but literally exist - like should he go alter his genetics?? tf he doesn’t even want all these guys to be attracted to him, and he also lost a dear friendship because of it. i would be horrified in his place