Kokan Musou: Kiraware Yuusha wa Mazoku ni Aisareru

After dying from an embarrassing incident of fatal overstimulation, Kantaro finds himself reincarnated into a fantasy world. In his previous life, he was an overweight young man with a deeply warped personality, and this new existence offers him no fresh start. Despite being reborn as a hero, his unpleasant nature ensures that he is just as despised by the people around him as he was before. However, Kantaro soon discovers that his body possesses a bizarre and extraordinary secret. His semen functions as a miraculous universal healing potion capable of curing any ailment. To complicate matters further, this unique biological trait also has the power to significantly enhance the strength of demons. As word of this incredible ability spreads, the very monsters humanity fears begin to covet him, transforming the rejected hero into their most prized asset. What follows is a wildly unconventional isekai fantasy centered on a mighty warrior whose greatest weapon lies between his legs. Scorned by humans yet fiercely desired by the demon race, Kantaro must navigate a dangerous new reality where his invincible crotch dictates his fate in this strange world.