Welcome to Demon School! Iruma-kun Episode 15 English Dubbed Episode Title:Kiriwo's Secret Room.Episode Description:It is announced the Battler Party will last three days and the first place prize will be an increase in rank for the Battler members and an increase of two ranks for the Battler president. Kirio continues working on his machine, which flashbacks show he was only able to complete due to Iruma's help, and that his powerful demon friend plans to use his machine to kill as many students as possible. As Kirio works in his hidden workshop he is suddenly interrupted by Iruma, who had been dragged through the air by his ring searching for Kirio's necklace...