Read manga: Kokan Musou ~Kiraware Yuusha Wa Mazoku Ni Aisareru~

manga
Summary:

Sweat Taro, who has ascended to heaven because he is too sick, reincarnates in a different world. Sweat Taro, who is distorted in character and is a kimodebu, is disliked even after reincarnating, but notices that a cloudy potion that cures anything from his crotch appears. Moreover, it also has the effect of powering up the demons, and it will be loved by the demons ...!? A different world reincarnation fantasy that is unmatched in the crotch !!! (Google Translate)