Isekai Nanpa ~Mushoku Hikikomori no Ore ga Sukiru wo Kushi Shite Neko Ningen ya Fuka Uchuu Dragon ni Koe wo Katte Mimashita~

It tells the story of an anti-social old man who was summoned by a tower wizard to save the world, told to reveal the skill he craved so much, then the old man decided to choose the seduce skill because he had been a virgin for far too long.