Side story about Rika's birthday and Kazuha and Rika going to a summer festival.
....…
"Make sure to come back by midnight, okay."
Because Kazuha had asked him to, Rika pushed to get off work earlier even though they were really busy with the Obon festival.
"I wonder if it's because it's my birthday. Maybe not."
As he opens his front door while reminding himself to not get his hopes up, he was immediately greeted with a hug by Kazuha...