Isekai Sniper wa Onna Senshi no Mofumofu Aigan Doubutsu

A gun enthusiast meets his demise while playing with a DIY pistol that detonates in his face. In the afterlife, he learns that he is to be reincarnated into a different realm. Upon awakening, he discovers that he is no longer human but has transformed into a small furry creature. On the brink of death, he encounters a stunning warrior, who chooses to look after him due to his fluffiness. However, the situation changes dramatically when he realizes that firearms are present in this new world.