15 year old gamer boy is isekaied into a world where summoned people are given skills/blessings. This guys blessing is unfortunately really bad so he is thrown into the Coliseum to at least provide some entertainment.

Mature content marked in spoilers

In the Coliseum fights are often male vs female with the loser being

'bred' by the loser. If the loser is male they are turned into a women and the winning women grown an appendage to be able to do that.

The FIFTEEN year old boy being the "pro gamer" that he is is able to make use of his terrible skills to end up winning a fight. And...yeah.....

I felt it was a rather gross read.... And a 26 year old women being described as an old maid honestly had me wanting to throw hands with a manga volume. 

With reads like these I find them even harder to find any joy from them when they seem to take themselves so seriously. I'm not against bad isekai harems or even ones with more mature content but this one just seemed to encourage SA against the women for the sake of it and I did not like that.