YoimiyaMore About Yoimiya: II Friendship Lv. 3
Our family has a long tradition in which we will give every client who orders customized fireworks a note. Its contents can only be understood by our family, and it records the specific formula of the fireworks that were ordered. Whether ten years or a hundred years pass, our family can make exactly the same fireworks as they did in the past so long as the client brings us that note.