RAINBOW

A hidden paradise that doesn’t appear on maps or satellite images: "Rainbow Island” Rainbow, the blue hero who protects this island, Kim Sun-Yi, an ordinary hula girl who savors simple, peaceful happiness, and Aurora, the hero of the dazzling and beautiful Soul City. A story of love and growth woven by these three very different characters.(Source: KakaoPage, translated) — Description from AniList community (anilist.co).