Reincarnation Coliseum manga, Reincarnation Colosseum Using the Weakest Skills in Order to Defeat the Strongest Women and Create a Slave Harem , Tensei Colosseum ~ Saijaku Skill de Saikyo no Onna-tachi o Koryaku Sh*** Dorei Harem Tsukurimasu ~Average high school student Mikagami Kouji is a hardcore gamer. One day he gets isekai’d and he only gets the skill "copy" which is apparently useless but we all know it’s secretly OP or something. He’s enslaved to be a gladiator by his summoner, the big b**ba, head priestess Zayd. He has to fight in the Colosseum and if he loses he gets raped.