Opening

Hatsune Miku finds a mysterious Sekai with a locked box. The Sekai was completely uninhabited. To help the mysterious owner of the Sekai find their true feelings, Hatsune Miku sends Saki Tenma and Minori Hanasato to find the owner of the Sekai and bring them hope. Meanwhile, Princess Olivia of the Origami Kingdom noticed her older brother acting strange. Their stories collide when Saki and Minori head into the Origami Kingdom and meet Olivia.

(Trigger warning: Mentions of suicide)

A Rescue of a King is a sequel to this work (posted on ArchiveOfOurOwn).