In a mountainous area in Wakayama Prefecture, a group of young people wanted to renovate a thatched-roof house to help attract visitors. With no experience or money, they relied on a local custom called yui that promotes mutual assistance. They recruited friends, local residents and professionals. One young team member even moved to the area to help make the project a reality. This is the story of how yui helped them overcome numerous challenges and create a lasting asset for the community.