Honestly, Chuuya began to notice that Dazai is constantly stupid in strange things: Dazai confuses right and left, does not orient himself in space, Dazai does not calculate the distance to objects well, he cannot imagine figures in volume..and he constantly forgets something, and also often crashes into things or falls. They're at Dazai's apartment for the weekend. Dazai has trouble coordinating his movements. Dazai is bad at looking for things and can't quickly focus on a large amount of text.