Timeline

• Pre-Series Timeline
• Timeline
• 12 Zodiacs

List of events dated from the start of the series

List of events dated from the start of the series:

December

• Dec. 10^th (Tue):
  • Yūma Kuga transfers to Third Mikado City Middle School and befriends Osamu Mikumo.
  • Yūma destroys a Bamster in the Forbidden Zone using his Black Trigger.

• Dec. 11^th (Wed):
  • Marmods show up at Third Mikado City Middle School, revealing that C-rank agents don't have Bail Out.
  • An Ilgar appears in Mikado City; destroyed by Ai Kitora and Yūma Kuga.
  • Osamu Mikumo meets Border's top brass, but ends up working with Yūichi Jin who is tasked with figuring out the abnormal portals.

• Dec. 12^th (Thu):
  • In the morning, Osamu, and Jin meet up with Yūma Kuga.
  • Yūma would reveal the culprit was thousands of Rads.
  • Thanks to Jin, every agent in Border joins to exterminate the Rads.

• Dec. 13^th (Fri):
  • The Rad Infestation comes to a close by sunset.
  • Jin and Yūma suggest that Osamu takes credit for discovering the Rads to avoid being fired and get promoted to B-Rank.

• Dec. 14^th (Sat):
  • Osamu Mikumo asks Yūma Kuga to meet up with Chika Amatori; Yūma Kuga vs. Miwa Squad fight begins.
  • Jin recruits Yūma along with Osamu and Chika to (unofficially) form Tamakoma Second; Yūma's past is revealed.

• Dec. 15^th (Sun): The newly formed Tamakoma Second meets with Yūichi Jin and Shiori Usami, the latter of which explains the basics of Border; their respective Tamakoma First mentors are introduced.

• Dec. 18^th (Wed):
  • Border's top teams have come back from their away mission after revealing their loot; Miwa Squad is assigned to steal Yūma's Black Trigger, but Jin alongside Arashiyama Squad intervene, thus initiating Yūichi Jin and Arashiyama Squad vs. Border's Top Teams.
  • Jin gives up Fūjin in exchange for Yūma's enlistment, to which Kido accepts the deal.

January

• Jan. 8^th (Wed): Jan 8th Border Enlistment Day
• Jan. 9^th ~ Jan 11^th (Exact date unknown): Osamu vs. Midorikawa happens.
• Jan. 20^th (Mon): Second Large-Scale Invasion occurs where Aftokrator invades Mikado City to kidnap C-rank agents.
• Jan. 27^th (Mon): Osamu Mikumo wakes up from his coma a week after the Second Large-Scale Invasion
• Jan. 28^th (Tue): Border holds a press conference about the Second Large-Scale Invasion

February

• Feb. 1^st (Sat): B-Rank Wars begin.
  B-Rank Wars Round 1
  Tamakoma Second vs. Yoshizato Squad vs. Mamiya Squad
  Lower Division Night Session
• Feb. 5^th (Wed): B-Rank Wars Round 2
  Tamakoma Second vs. Suwa Squad vs. Arafune Squad
  Middle Division Night Session
• Feb. 8^th (Sat): B-Rank Wars Round 3
  Tamakoma Second vs. Suzunari First vs. Nasu Squad
  Middle Division Day Session
• Feb. 15^th (Sat): B-Rank Wars Round 4
  Tamakoma Second vs. Ninomiya Squad vs. Kageura Squad vs. Azuma Squad
  Upper Division Day Session
• Feb. 19^th (Wed):
  • Galopoula's Invasion.
  • B-Rank Wars Round 5
    Tamakoma Second vs. Katori Squad vs. Kakizaki Squad
    Middle Division Night Session
• Feb. 22^nd (Sat):
  • Hyuse joins Border.
  • B-Rank Wars Round 6
    Tamakoma Second vs. Ōji Squad vs. Ikoma Squad
    Upper Division Day Session
• Feb. 23^rd(Sun):
  • Yuri Rindō and Michael Cronin are introduced.
  • Chapter 163 Dinner party at Kageura's family restaurant is held.

March

• Mar. 1^st (Sat): B-Rank Wars Round 7
  Upper Division Day Session
• Mar. 5^th (Wed): B-Rank Wars Round 8
  Upper Division Night Session
• Mar. 13^th (Thu): The away mission test orientation takes place.
• Mar. 16^th (Sun): Captain interviews are held in preparation for the away mission test.
• Mar. 17^th (Mon): Phase 1 of the away mission test begins.
• Mar. 23^rd (Sun): Phase 1 of the away mission test ends.
• Mar. 24^th (Mon): Phase 2 of the away mission test starts.
• Mar. 25^th (Tue): Phase 2 of the away mission test ends.