full timeline
TABLE OF CONTENTS
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2100 - prehistory until this point. oldest character in the lore is born.
2150 - birthyear of kawara ryuuji
2188 - start of the game
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2100 - prehistory until this point. oldest character in the lore is born.
2150 - birthyear of kawara ryuuji
2188 - start of the game
1918
A mutated type of avian influenza became a pandemic during this year in the middle of World War I. Approximately 600 million people (~30% of the world's population) were infected; 50 million - 100 million infected people died. This event killed the most people in the shortest time amidst war, disaster, and disease.Their lungs were destroyed by leucocyte-induced cytokine storms. According to human history, this was the extent of the influenza pandemic.
2068
With its virulence weakened, influenza became endemically transmitted among birds, but it still had the capacity to infect humans. A mutant strain of avian influenza (H5N1 Type A) becomes a new type of human influenza, nicknamed “Sumatra Flu”.2070
The human population of the world plummets; within 2 years, it drops to 30%.In August, as a countermeasure against birds as endemic intermediary carriers of Sumatra Flu, the avian annihilation project “Operation Carneades” is executed. All humans are inoculated beforehand to protect them from the deliberate diffusion of the lethal virus.
2071
There is a brief drop in the bird population, and then a strange phenomenon occurs. Because of the virus, birds begin to mutate and evolve; avian brains develop rapidly.Birdkind begins to launch a succession of assaults upon humankind starting from December of this year; Hitchcock Winter.
2075
On July 4th, birdkind adopts a Declaration of Independence in the Philippines. After this, humankind and birdkind are locked in savage battles.Forth comes 30 Years of War.
2100
The human population has dropped to 4.6% compared to 2070. Most of the deaths were caused by disease. War deaths were less than 10%.(In the year 2068, there were 10.2 billion humans; in 2070, 3.06 billion; by the year 2100, there are 140 million humans. This is an extraordinary rate of decrease, considering that the BCE world population was about 200 million - 300 milion humans.
Meanwhile, human immune systems adjust, and their bodies acquire resistance. The new type of human influenza subsides.
There is a ceremonial cease-fire agreement.
Nevertheless, intermittent skirmishes continue thereafter.
Sometime after this but before 2150, Kenzaburou Urushihara is born. He gets married at some point, but his wife dies before 2188.
2150
Feb 17 2150, Kawara Ryuuji is born.2157
Jan 4 2157, Nishikikouji Tohri is born.Born in Kyoto, Tohri has an elder sister and elder brother. He was head of the Second Optical Weapons Division (SecOps) at 17/18 (perhaps even earlier) and onward, at least until he left due to LiSciRe getting better results than his division.
2161
Dec 12 2161, Ichijou Utsuro is born.Ichijou Utsuro was born as heir to the industrialist heads of the wealthy Ichijou Group in Aves High City. He quickly became aware of his parents' own selfishness, greed and neglect towards him, and became cynical. He believed his parents were 'disappointed in how he'd turned out.'
2162
Sep 23 2162, Uzune Hitori is born.2163
Mar 3 2163, Nanaki Kazuaki is born.2165
Mar 7 2165: Aves High City terrorist bombing.In the capital metropolitan district of Aves High City in Area A23, Section #1, the regional building suffers a series of explosions as human radical extremists carry out consecutive suicide bombings.
At the age of 3, Utsuro and his parents are caught in a terrorist bomb attack on his home city, destroying his house and killing both his parents. Even though he was taken to a hospital right away, he was in a coma for 3 days. He sustained brain damage resulting in colorblindness, severe nearsightedness, and weakness to the right side of his body (jpn: "slight paralysis.") (It's not outright implied whether it's nerve damage, damage to the spine, hemorrhage, encephalitis, meningitis, etc, but it appears to not be degenerative.) (lexlee20 translated the sentence as "he also sustains slight paralysis and impaired eyesight on the right side of his body", which could also mean that his blindness only affects the right eye, but maybe that's overthinking it.)
April 2165: An interspecies non-aggression pact is signed. It stipulates truce rules and the segregation of habitats.
In 2165: at around age 3, Hitori was delivered to Heartful House as a war orphan.
2167
Oct 19 2167, Fujishiro Nageki is born.Nageki is born to two mourning dove parents, one of whom likely has or is carrying the gene for a uniquely delicate immune system, a trait that Nageki inherits.
2168
At the age of 6 (sometime during August), Utsuro transfers his entire inheritance to his relatives in the Ichijou family, and vanishes, changing his name and identity to 'Isa Souma.'2169
Nageki is brought to the Hatoful House around the age of 2 (after October) after his parents are killed in some kind of human attack. Due to his weak health, he preferred reading to playing with the other orphans, and quickly became attached to Hitori (7), who looked after him.Isa Souma (7) joins the Hawk Party.
2170
Apr 25 2170, Sakazaki Yuuya is born.2171
Apr ?? 2171, Tosaka Hiyoko is born.Tosaka Hiyoko was born sometime after April to human parents, raised in the wilderness of a nature preserve for the human species. Because of humankind’s and birdkind’s peaceful segregation, caused by the interspecies non-aggression pact created after the Aves High Bombing Incident, she has been accustomed to living in the wilderness since childhood. both of her parents belonged to the “Mother Bird Faction”, an organisation who worked in mediating between humans and birds.
May 2 2171, Akagi Yoshio / Higure Anghel is born. He was born in Japan and doesn't know any Filipino language.
Jun 23 2171, Shirogane Le Bel Sakuya is born. At this point, Sakuya is the fifth child of Le Bel. Sakuya has an elder sister and four elder brothers, two of which are twins. He's the youngest of the five Le Bel children.
Jul 12 2171, Okosan is born.
Dec 3 2171, Kawara Ryouta is born.
2174
Nageki (6/7) is infected with and survives a strain of avian influenza. However, his weak immune system allowed the infection to continue living in his body, eventually mutating into the Charon Virus.2177
Ryuuji dies. Sometime during 2177, Ryuuji (26/27) goes on another trip to an island outside of Japan for research and falls ill with a deadly disease. As he's dying, he asks Souma (15) to grant Ryouta (6) a wish, if he ever happened to run into Ryuuji's son. Souma becomes head of LiSciRe soon after.2180
Sep 2 2180: The Hatoful House Incident occurrs. Afterwards, Nageki (12/13) and Hitori (17/18) move out.?? ?? 2180: The St. Pigeonation's Institute was founded with the ideal of coexistence between birds and humans. The Ichijou Clan was the main financial backer, although the majority of investors had ties to the Hawk Party.
Kitsugu Ichijou is elected as the academy's first Headmaster.
Around 2180-2181, when Sakuya is 10 years old, at the start of winter, Albert is employed as a butler for the Le Bel Mansion. In winter (either the same, or a year later), Sakuya's father, wet nurse, and siblings are all abroad, and Sakuya is left alone to take care of the mansion. He gets attacked by a different assassin, and Albert kills them. Sakuya hires Albert as an assassin here.
2183
Jan 12 2183: Nageki (15) enrollment at St. Pigeonation's is decided. As Nageki's condition worseneed, Hitori (20) pleaded to multiple hospitals, and was noticed by lab researcher Isa Souma(21). Isa offers both medical and academic support from St. Pigeonation's Academy.Yuuya (13) enters the Dove Party organization "Heaven-Soaring Wings" and begins spy training.
Aug 4 2183: Start of experiments to test the lethality of Nageki's virus. During Nageki's summer vacation, he is confined to the school's affiliated medical center under the pretext of intensive hospitalization.
Aug 29 2183: The underground research facility is destroyed by fire. Nageki dies, the school's affiliated medical center is closed down.
?? ?? 2183: Hitori is pursued by the Hawk Party and keeps a low profile. It's not stated exactly when Hitori meets Kazuaki, so my theory is that, although "Kazuaki Kun's Book" takes place in the MIRROR timeline, Kazuaki meets Hitori on a rainy night, so in other timelines too, it may have been an /autumn season./ Some people theorize that Hitori met Kazuaki in winter, like December 1st, and their suicide pact happened 7 days later, but that sounds absurd to me. It would've been 3-4 months since Hitori started being pursued by the Hawks. It sounds too weird to be Moa's intention, compared to the rest of the timeline.
Dec 8 2183: Hitori betrays Kazuaki. Hitori steals Kazuaki's identity and disguises Kazuaki's corpse as his own (possibly singed it). He left it for the Hawks to find. The remains came to be stored (boxed and processed) in Area D3 Section 1.
2185
Autumn 2185: Yuuya (15) is deployed to Japan to covertly infiltrate and investigate St. Pigeonation's. As Yuuya's handler, Leone was employed as a janitor at St. P's at the same time.2186
Nanaki joins the teaching staff at St. Pigeonation's. It's implied that he spent the previous few years building a reputation for himself, and became a nationally-renowned mathematician within 3 years.2188
April 2188: THE GAME BEGINS.Before the school year, Yuuya learns that Sakuya will move to Japan and attend St. P's this year.
It's not until Sakuya enrolls and undergoes a physical examination by Shuu, that Shuu digs into his DNA and finds out Yuuya's secret, blackmailing him from this year onward.