The Crimson-Eyed Lonely Master

S1, E4: There is something strange going on with Yunyun. She always ranks in the top three for test scores, but when the highest scores were announced, her name wasn’t even mentioned. A concerned Megumin tries to talk to her, but to no avail. Then one day on their way home from school, Yunyun asks Megumin for some advice about the meaning of friendship.