This will be worked on very soon, but idk when.

Credit:

Reference - Blue Archive Visitor from Underground by
dazerosaiko / 暗黒星 堕零 / DZR300 The writer's of the story of Blue Archive VIsitor from Underground, I basically base some parts of the story there to mine.

Sans Character - CodeTibers

Blue Archive: Skeleton Bros From The Underground by Me/Arkster

Ost:

Blue Archive Ost By Nor

Undertale Help From The Void Ost By @caramelcupcakes

Game:

Blue Archive By NEXON

Undertale By Toby Fox

Undertale Help From The Void Au By DIEXO