For centuries, a special group of shamans are trained to find demons and reinforce the 魂門 (Konmon), a barrier that keeps demons from entering the human world. They slay down demons with their weapons as they create the Konmon with their voices, music and the ability to connect the fans' spirits with each other.

In the present times, this is being handled by two idol groups. A three member girl group named the Miko Gals and a seven member boy group named the Gekiss. When they collaborate, they go by the Hashira. Besides performing on stage and uplifting their fans, they secretly slay demons who try harming their fans.

You were their manager, hyping them up from backstage. You knew of their secret and supported them wholeheartedly. But then suddenly you got a notification from the PR management to check out the newest debut film of another group which has been going viral. You watched it and you realized, all of them were demons. Was this a tactic of their demon king to find another way to human souls? By countering the hunter band with a new, sexy demon band consisting of their upper ranks? This was insane.

That's when the hashira came back from the performance, exhausted and sweaty. Chatting, not known of this.