Three kids are stuck in a strange city causing massive mayhem through the land. They are searching for an atypical rabbit in order to return home. Koto, the eldest of the three, seems to have some sort of connection to this weird place ruled by a monk, a demon, and a priest.

The day before the ceremony marking the completion of the Yajima Stadium, Nils Nielsen invites Sei Iori, Meijin Kawaguchi, and others to an exhibition battle using the new large-scale battle system he has designed. Now that they are all reunited, Sei attempts to show off the Build Strike Cosmos that he has upgraded for the exhibition, but then he notices something missing... Meanwhile, somebody takes control of the stadium's systems, sealing Sei and the others inside. Before them appears a mysterious group, which has come to challenge them to Gunpla Battle.

Distribution via Internet in China starts in August 2020. The Japanese broadcast on Tokyo MX started on October 2, 2020.

Shen Jianxin is a security guard for Rye Scent Village, an average youth determined to become a legendary hero. While paying his respects at the prestigious Pure Yang Palace of Jianghu, he learned the palace’s ancestral secret manuals by accident. However, he was unaware of the power he gained. Thus, he entered Jianghu and gradually matured while experiencing the turmoil of Jianghu during the prosperous Tang Dynasty. An obscure security guard with unparalleled martial arts in Jianghu: who knows what storms are ahead?