Isekai de Te ni Ireta Seisan Skill wa Saikyou Datta You desu.: Souzou & Kiyou no W Cheat de Musou suru

29 year old corporate slave Kousaka Kou is randomly transported to another world and gifted some standard skills. He has the option to be the sage, hero, or demon king. He chooses none of them and acquires a secret skill. With the skill, "Build," and the hidden skill, he starts his life as an advent