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ok i had a lot of reactions while reading this...
MC was summoned to a kingdom that is constantly at war and as they don’t have enough military force they summon people from other places (so far it’s a standard isekai),
The skill he got was Copy jujed as “trash” and he was thrown in coliseum.
In this coliseum battles between men against women take place to entertain the nobles where the loser becomes the winner’s slave, in case the man loses he can be literally transformed into a woman or vice versa and will be “inseminated” by the winner.
The Copy skill considered weak ’cuz even if he is able to copy an opponent’s powerful skill he won’t be able to use it effectively to defeat someone who has been using it for a long time.
The MC’s first opponent is a sadist woman known as Merry the Torturer who has the skill know as “Instant death if eaten”, she is in a bad mood and decides to castrate the next opponent during the match to keep him as a woman for life.
Even if he dies he will be resurrected just to be violated.
The MC goes into despair but soon after realizes it’s just like a game and starts repeating 「Use skills to fight, Even dying won’t actually die, there is no internet or morals to judge me, I can use any method to win even abuse bugs or cheats」《Jojo’s pose》.
In the arena after everyone humiliated him for having a Copy ability, the MC declares 「Guys! I will defeat this “late woman”... (a woman who has passed the age of marriage) and inseminate her」