Diavolo, the prince of the Devildom, holds an unlikely dream: he wants angels, demons, and humans to live in harmony. To begin, he wishes to see members of all three races studying together at the Royal Academy of Diavolo and practicing coexistence. However, the human he intended to summon for the exchange program unexpectedly appears as a fluffy pink sheep with no memories! Named "Ibuki" by the seven demon brothers tasked with caring for them, this poor, lost lamb must carefully navigate the turbulent relationships of the ultimate dysfunctional family. While they should merely hope to survive until they regain their original appearance and identity, perhaps Ibuki might find a place to belong that suits them just as they are now.