Timeline / COUNTER:SIDE

• The event that led to Nao's cryosleep and Chinatsu and Chifuyu's maternal grandmother apparently being murdered by Hayami Kanade occurred in 1984.
• The flashbacks of "Counters Saga" occurred from November 2003 (Chulsoo's first meeting with the Subculture Research Club at Yeouido) to December 2004 (Chulsoo wakes up from his coma one month after the Corruption Disaster at Yeouido).
• The Administration Failure and the fall of Nordnavik occurred in 2024.
• The death of Joo Shiyoon's parents occurred in 2038.
• Episode 1 starts on the year 2044.
• "World's most delicious and horrifying chocolate" occurs on February 13-14, 2044.
• "Killer of the Holy Night" occurs on December 31, 2044.
• "Miracle of the Holy Night" occurs in December 2045, ending on Christmas Day.
• The Qliphoth Game of the previous worldline (as seen in the ending of "The Inheritor") occurred in December 2049.