Moeru! Onii-san

Kenichi has spent all his life in the mountain as a feral child. When he comes down to a city in search for his family, a huge culture shock slaps him in the face in forms of technology, social norms and etiquette. Having never lived under social constraints, Kenichi's wild demeanor and naiveté bring all sorts of troubles to his long sought-for family. Will this wild youth learn to adjust to the modern city life?