One day Patchouli finds a stray just outside the Scarlet Devil Mansion. What she ends up getting is a new apprentice and a connection to the world of Fodlan. What Lysithea receives is a Sensei, an association to Gensokoyo, and a whole slew of complications that arise from being raised in a Mansion full of Devils and being taught by an unfortunate Witch.

For Kyoko Sakura finding a strange pendant and the summoning of a Servant in Red and Black was all that was needed to completely change her world. Perhaps through this man she will one day find salvation. A timeline in which Kyoko summons Archer.

For Lysithea the existence of her two Crests is both her most frightening and the greatest secret for her to keep. So what does she do now when her second Crest is revealed to everyone upon accidentally wielding Thunderbrand? Nothing good, that was for certain.

Klee has decided to travel the world of Teyvat in search of her mother. Hijinks and mass destruction ensue.