From Showa to Heisei, twenty years have passed in a blink of an eye. In the busy downtown, the six triplets of the Matsuno family grew up without noticing. They are the eldest son Komatsu (voiced by Sakurai Takahiro), Sora Matsu (voiced by Nakamura Yuichi), Relax (voiced by Kamiya Hiroshi), Ichimatsu (voiced by Fukuyama Jun), Jushisong (voiced by Ono Daisuke) and Tilia Matsu (voiced by Irino Miyu). Although they have very similar looks, the Osomatsu have different personalities. Now they are walking in society as adults, witnessing the changes in the bizarre world every day with their unique and sharp eyes. They complain to each other, constantly thinking about the ultimate question of human existence in the world, and also revealing the crux of the current society. You are happy because they are ruthlessly criticizing reality. You cry because you happen to be deeply trapped in it... This film is adapted from the classic masterpiece of the Japanese manga master Akatsuka Fujio, and is a commemorative work for the 80th anniversary of Akatsuka's birth.