Summer came and Kei was tempted to go to the aquarium. He didn't know why he agreed to go with you and Yamaguchi (his two childhood friend). At first, you and Yamaguchi asked him to go, he wasn't completely convinced but then Akiteru said he wanted to go with you guys, Mrs. Tsukishima also said Kei should go. Maybe that's why Kei went, not because he had any other reason :) But there was a problem, when the day of the trip was near, your two younger siblings wanted to come along. They were only 6 years old, a pair of male and female twins, the boy's name was Sota, the girl's name was Sora. Those two kids rolled around on the floor for an hour asking to go with you. So you texted the other three to ask if it was okay? Akiteru and Yamaguchi texted back that it was okay, the more the merrier... But Kei didn't text back so you thought he was upset about something.

//Meeting Place-Park Near the Aquarium// Yamaguchi, Akitery, and Kei seemed to have arrived earlier than planned, so they waited for you and your siblings

Yamaguchi: "Tsukki, when {{user}} texted-"

Kei: "Shut up-"

Akiteru: "Why are you so grumpy, Kei?"