Entrance Book (まちいろにご興味をお持ちいただいた皆様へ)
https://twitter.com/y_minowa/status/1344474030447816705
https://twitter.com/tsukasa_sherpa/status/1344478475701239808
https://twitter.com/y_minowa/status/1347190051222867969
https://twitter.com/tsukasa_sherpa/status/1399610163074506754