Can't Stop Cursing You manga volume 3 features story by Kensuke Koba and art by Natsuko Uruma.

A new bout begins! The contest this time? Demon tag. In other words, touch the “demon” before their counter hits 666-or it’s game over. But the demons are brainwashed students with murder on their minds, so one wrong move could prove fatal. Curse-Breaker Saeyama and his assistant Yamazaki will have to divide and conquer if they want to beat the Contractor and save the students…!