This is the best confused face, I’ve seen in a while. Kikko is the best. Spoilers for episodes 1-4.
Concrete Revolutio had been following a clear “Present” and “Future” timeline up until this episode. Unfortunately, Episode 4 comes in to muddle everything up and confuse you. It’s hard to keep track of what’s going on when, so I’ve made this timeline guide to help those of you who are also confused. I hope this helps.
14th of Shinka Era: Gigantopitecus Gigantus found on an island in the Indian Ocean. (Episode 4)
17th of Shinka Era: US Army brings Superhumans to fight the giant beast. (Episode 4)
19th of Shinka Era: An unspecified war ends. (Episode 1)
29th of Shinka Era: In Tokyo, the doctor finds Emi and a naked Jiro (without left arms locks!) on a bridge after a beast attack. (Episode 4)
January, 34th of Shinka Era: Hiroyuki, the homeless boy, finds the baby Gagon.(Episode 4)
Januray, 41st of Shinka Era: The Bureau encounters Gross Augen for the first time. Earliest appearance of Jiro with the locks and bandages on so far. (Episode 4)
July, 41st of Shinka Era: Kikko joins the Bureau, Gross Augen leaves Earth. (Episode 1)
August, 41st of Shinka Era: Fuuruota joins the Bureau, and stops the bug species. (Episode 2)
August-November, 41st of Shinka Era: Beasts begin attacking and many Superhumans appear to defeat them. (Episode 4).
November, 41st of Shinka Era: Kikko and Jiro meet with Beastly Radio Wave. (Episode 4)
February, 42nd of Shinka Era: The robot detective and the female robot incident. (Episode 3)
April, 42nd of Shinka Era: Master Ultima returns from Mars. Beastly Radio Wave is exposed, Jiro activates his locks. (Episode 4)
April, 46th of Shinka Era: Kikko finds and chases down Scarf Jiro. Scarf Jiro refuses to return to the Bureau. (Episode 1)
February, 47th of Shinka Era: Male robot returns to Japan. Robot detective is disillusioned with Japan, fights Scarf Jiro. (Episode 3)
August, 48th of Shinka Era: The bug queen confronts Fuuruota. Scarf Jiro emerges to calm the bug queen and comforts Fuuruota. (Episode 2)
And that’s where we are at so far in Concrete Revolutio. Let me know if I’ve made a mistake somewhere!
Thank you Federico for the Images!