Queen Kristina was framed by her half-sister and thereby executed at the tender age of 16.

16 years later, amidst the festivities in honour of the Queen’s birthday, a young girl is awash with nostalgia. Theresia, the daughter of a duke.

Her butler whispers in her ear: "How long do you intend to have me protect you?"

This young girl is none other than the former Queen, her reincarnation made possible after striking a deal with the alluring demon before her!

The curtain rises on a noble lady and a demon as they set out on a quest for vengeance!

In the corner of a certain town, there is a teashop where the master, Tsukasa, obtains and cares for plants from the depths of hell.