Third season of .

In an attempt for survival, Yu Renjie, the son of the demon lord, was ordered to enter Hero's Academy which only recruits distinguished and upright disciples. The goal is to obtain a Hero's Certificate which can bring legitimacy to the demon clan. This is extremely dangerous. Once the identity of a demon cultist is exposed, countless righteous knights will kill them on the spot. But on the first day of school, Yu Renjie was shocked to find out that his personal information had been leaked. In order to hide his identity, he had no choice but to put on women's clothing. His dangerous and hilarious campus life is about to unfold!

At Maigahara Music College Affiliate School Maigahara Senior High (abbreviated as MaiMai) that gathers the most promising musical talents, there's a rumor circulating among students. "If you give an amazing performance at the school festival, you get special extra credit (or so they say)." Serina's grades are not very good, so she immediately believes the rumor and decides to form a band.

They always steal the prey they aim for. That is Phantom Thief Queen. Gender, age, nationality unknown. Together with their partner Joker, RD, they travel around the world on the airship Troubadour. This time, the Queen is aiming for a cursed jewel, the legendary Rose of Linden. A hypnotist, an acrobat, a magician...the talented circus members challenge the Queen! What is their purpose? In order to get back the jewel, the Queen stands up to the challenge in a bold and brilliant way (or disguise). Nothing is impossible for the Queen!