Before his family left the town of Sakuranomori, Sana Hidaka said farewell to his five best friends, thinking that he would never see them again. Five years later, however, he finds himself returning to Sakuranomori to finish high school while living alone in an apartment owned by his parents. Can the threads of friendship severed by time be mended? Will his friends even recognize him? Or have the changes in their lives as they've grown from children to teenagers made them into different people, pushing them even further apart?