1x8 - Ms. Vampire Who Lives in My Neighborhood.

When Sophie enters the living room, she finds Akari and Hinata staring tired and defeated at the table. She then finds out that summer break is almost over, yet almost none of their homework is finished, which is why the two of them are doing a homework marathon. Then, with progress already being slow, Erie makes an appearance. She suggests that she could help with the homework, however...