It was a school trip to an art gallery.
They were all given two assignments. The first was to take pictures and make a report. The second was to choose an artwork that conveyed some kind of emotion and to recreate it using one's own style of art.
The teachers didn't have that much of high expectations from the students since most of the art displayed in the exhibition was too complex and hard to recreate without losing its original essence.
Young Akira was carrying his camera and taking photos of not only the artwork but also of the students in his class. Unshockingly enough, the camera roll was mostly filled with photos of Asahi.