Ymir Midgard is an apprentice swordsman who struggles every day to become a full-fledged swordsman.
He is a bit of a self-confident man, and as he continues to challenge and lose to monsters, his anus is relentlessly picked at, and he awakens to a feeling that no man should be allowed to experience.
“A man shouldn’t feel this good with his butt.”
“I’m cumming in your ass. Why does it feel so good even though it’s a poop hole!?”
“My anus will turn into a girl soon”
And many times, even though he is a man, he cums in his anus.
Ymir, who learned of the joy of females, played with his anus to ward off evil thoughts in order to concentrate on his training, and even offered his anus to a low-class goblin begging for his life. Also struggles anally against monsters.