Girl-band vocalist X mechanical engineering student gets teleported to another world on the day of her performance at the Budokan.

Minichi, a mechanical engineering student at Melhouse University, is the vocalist of the girl band "Petal Youth" along with her friends Rimi and Hataki, who have recently become an internet phenomenon. Within one-and-a-half year of debut, they secured their spot in the Budokan. But the girls got caught up in an devastating accident on the big day. Surprisingly, Minichi found herself teleported into an unknown world from where she can't return until a prophecy is fulfilled. Read to join Minichi on this journey back home.