As Akari's summer break has finally begun, she wracks her brain to come up with fun, summery things she can do together with Sophie.
However, the ocean or anything outside are all a bad fit for a vampire like Sophie.
Then she has a moment of clarity and realized that a firework festival is at night and a summery activity, so she immediately begins preparing yukata.
Erie and Hinata and join them to go to the festival, however...
Humans have a rhythm that suits them best.
.لدى البشر توازن يلائمهم أكثر
Menschen haben einen Lebensrhythmus,
auf den sie getrimmt sind.
Los humanos tienen un ritmo
que les va bien.
Los humanos tenéis
vuestro propio ritmo.
Gli umani hanno dei ritmi 
sonno-veglia caratteristici.
Humanos têm um ritmo
que faz sentido para vocês.
У людей свой, наиболее 
подходящий им ритм жизни.