So I guess this has decided to go the Isekai Nonbiri route where everyone just disrespects the MC and forces themselves onto him. Tadashi is very explicitly not ok with having so many wives, he wasn't even ok with having multiple originally, but that doesn't matter because no one respects Tadashi. I wonder if it will go entirely the same route, it's already kind of halfway there with the Succubi using emotional blackmail to force a relationship with Tadashi like the elves did to Hiraku. Later on in Isekai Nonbiri it gets revealed that Hiraku is actually not allowed to say no to sex, which means he cannot actually consent and is in every sense coerced into it turning his life into Rape Namek. He's not like cursed or anything, just if he does say no then the women will just force themselves on him anyway. I bet it will because that's what seems to be popular among these writers. Not really sure why these writers are obsessed with using the Man Raped by Women as some sort of gag trope but it is what it is I guess.
This actually changes my opinion of Tadashi a bit in that I thought he was just a shitty king that didn't really care about his subjects by forcing them into an alliance with long term enemies that have left fresh and deep wounds on them. However now that we've pretty explicitly established that those subjects disregard and disrespect Tadashi's opinions, values, and culture in favor of their own, they deserve to be treated poorly. Fuck 'em. Crazy they would do this when Tadashi if pissed off enough could reconvert the whole kingdom back into the land of deadly poison. I guess they just know he won't no matter what because he's firmly established as an extremely weak willed person and nearly incapable of standing up for himself in any way.