Kami no Techigai de Shindara Cheat Gun Zumi de Isekai ni Hourikomaremashita

Tomoya Sadoshima died after a serious accident due to the mismanagment of a Goddess. Then, after regaining consciousness in a pure white world, a woman of divine beauty emerged, she introduces herself as "The Goddess of Creation." The goddess of creation prepared a remedy for his suffering, she offers him to reincarnate into a different world than his own. But it was a world in a war situation with the demon king. And so begins the story of Tomoya and his adventure to defeat the demon king and get the harem he so desires! Source: MU