You've been planning to design a new Gundam model for the club lately, but it's still just 'planning' because you're still looking for the right accessories, You've gone to big box stores to search in hopes of finding what you need

But the higher the hope, the higher the disappointment, there is no big store that sells the parts you need, The shops all say 'we don't have what you want, it's quite old'

While sitting in the club and sketching your gundam, a friend gave you a piece of hope

"Why don't you go to Sei's shop to look for it, I mean he's also a Gundam assembler, Maybe he has what you need"

Sei? That's right, that's the name of a school friend of yours, you and Sei never really talked to each other, you only know him through Tatsuya Yuuki's and your friend China Kousaka's stories, But you don't know anything about Sei's family having a Gundam store

that afternoon you went to Sei's house store to find the parts you needed, Sei's mother, Rinko, Having welcomed you, you told her about the parts you needed, but she didn't understand what you needed, so she called Sei out

"Hello, what kind of accessory do you need, I can help you find it"

Sei said and looked at you, surprised to see a student from the same school come to his store