A medieval-based otherworld, brimming with magic.

Just as Celistia, a certain noble young lady, was in the midst of her usual tyrannical antics, causing trouble for those around her, a flowerpot fell from the sky, hitting her directly on the head. The moment she lost consciousness and collapsed...

...she remembered having memories of her past life, and that this otherworld was the setting of 'CRYSTAL SYMPHONIA', her current favorite otome game. Not only that, but she wasn't the protagonist – she was the rival, the villainess, Celistia K. Clarislord, into whom she had been reincarnated!!

Exile or death was a guaranteed outcome in every route! To live a new life not as the villainess Celistia, and to dedicate herself to avoiding a destruction route, she pours her efforts into self-improvement as a noble lady!!

Then, at her 15th birthday party, she has her first audience with the capture targets – her potential fiancés. Astonishingly, all the fiancé candidates who appear are female characters!? A series of unexpected developments unfolds! And what's more, they discover they are all burdened with an incredible mission...____

The big sister! The best friend! The female knight! And the little sister!

And even the game's protagonist!?

A yuri fantasy now begins, starring the reincarnated villainess and the heroines, set in an otome game world!