Sono Mono. Nochi ni... ~Futsuu no Otoko, Saikyou no Michi o Iku~

Wazu was an ordinary townsman who shut himself off in the "mountain" because of an unfortunate course of events. After 2 years, he decided to come down from the mountain to meet with people. But there were various misunderstanding about the "mountain" which he shut himself off in. And then he repeatedly had encounters with people. And after that. . .