Scary Dudes at School (学校の怖いやつ Gakkō no Kowai Yatsu?) is the fifty-seventh chapter of the Dandadan manga series.
Summary[]
The Turbo Granny brings Okarun to a school where she plans to help him improve on using her powers. Aira then shows herself to question Okarun on why he and the Turbo Granny are breaking in. After the three entered inside the school, Aira learns of Okarun's plan of becoming stronger and tells him that she wishes to do the same. The Turbo Granny leads them to a music room where she explains to Okarun, by playing on a piano, that what he needs to focus improving on is his combat rhythm to complete a set of actions in one beat, a feat she explains that the Evil Eye and Aira in her Acrobatic Silky form can greatly perform. Okarun and Aira are then confronted by six ghostly Music Room Portraits, with one of them becoming irritated by the bad piano playing from the Turbo Granny, and prepare to leave. However, after the Turbo Granny tells the Music Room Portraits that the two are at fault, Okarun and Aira become forced to defend themselves against the Music Room Portraits as they send out multiple exploding musical notes.