“I’m never going to give up!! For that reason, I became a Period!!”
Evil demons known as “Spiral” —made of souls who died in agony—threaten the people of the world. In order to stand up against Spirals, people founded the “Arc End” to suppress the Spirals. Individuals whose skills are recognized are admitted to Arc End to become “Period” to fight for peace.
Hal, who failed the Period admittance test 38 times, was accidentally admitted as an “Assistant Period” in Arc End 8th Squad. Forming a team along with other new members, Gazel and Liese, he is finally able to take his first step towards reaching his goal!
所謂的「Period(休止符)」指的是一群人，他們打倒從絕望而生的妖異怪物「螺旋」。隷屬於「Arc End(終結圓弧)」第八分部的見習「Period」海爾，也為了斬斷絕望的輪迴，投身於無止盡的戰鬥當中……。 原本應該是這樣，但是……！！ 第八分部卻因為神祕的竊盜案導致財政破產，總部也棄之不顧，剩下的「Period」竟然只有海爾他們三個人。 他們為了重建分部，投身於「無止盡的地下業務」。