MINKY MOMO IN YUME NI KAKERU HASHI

A bridge's legend tells that when two people meet on it, they will surely meet again. Momo meets a boy who doesn't believe the legend, and promises that she will meet him again to prove it. As the year passes, she comes every day to wait for him, and becomes a small part of many people's lives. (Source: Anime News Network) — Description from AniList community (anilist.co).