Heliorise

Since childhood, you've been an orphan with no family. But on the day you come of age, a mysterious letter arrives - you have a sister. She lives in the world's largest city - Heliorise, and sincerely invites you to reunite. Is she truly your long-lost family? Why reach now? What does she want after all these years? Only one thing is certain - your life is about to change forever...

[From Itch.io]