Senshi ga Fuyo Sareta Kyouka Mon wa Inmon Datta!?

A warrior named Klaus goes to see a renowned enchanter who makes crests for people, in order to get his own power-up crest and become stronger. However, the crest did make him stronger, but it also increased his body's sensitivity and libido. Now he may be stronger, but he also spends all the money he makes from it on prostitutes. One day, one of his acquaintances from the adventurers' guild touches Klaus' nipples, making him horny. After that, the man fucks Klaus, making him realize that he likes having sex with men too. He then decides to use this "new talent" of his to start working as a prostitute himself, when he's not working as an adventurer.