Bokutachi wa Benkyou ga Dekinai S01E13 - The Light in a Genius's Eye is All X

When Nariyuki goes to a festival, he runs into Uruka and strolls with her past the food stalls, helps Rizu deliver food, and takes an injured Mafuyu to Asumi's father's first-aid tent. In other words, as ever, he's a busy do-gooder.