It's been 20 years since the war between Demon Tribe and Human.
Inside the broken Demon Lord's Castle, ruined by humans,
Mao, the young Demon Lord, thinks about peace.
Two subordinates come to her.
"Peace", a diligent and stuborn demon, suggests living with humans.
"Dakra", a black-hearted, sharp-tongued demon, suggests destroying all human beings.
Because of Mao's indecisiveness, she cannot decide what to do...
"Oh yes! How about we go to a human city and have a look!"
To live with humans, or to revive the demon tribe...
To decide their fates, the three begin their journey to a human city...​