Reincarnation Coliseum, Vol. 1 (manga)

Kouji Mikagami is a normal high schooler who loves playing games. But one evening, he finds himself summoned to another world full of extraordinary magic and voluptuous women! To top it all off, he’s received a unique skill as a blessing from the Goddess—Copy! Surely that’s top-tier, right…? So why is Mikagami fighting as a gladiator-slave in a coliseum where the losers are ruthlessly bred at the winners’ mercy?!