Saya no Uta, a visual novel developed by Nitroplus and written by Gen Urobuchi, is first released in Japan.
An unofficial English translation patch for Saya no Uta is released, making the game accessible to a wider audience outside Japan.
Saya no Uta is officially released on Steam, providing legal digital distribution and bringing the game to international audiences.
Furuya, the protagonist, suffers severe brain damage after a car accident caused by a chemical weapons attack, altering his perception of the world.
Following the accident, Furuya perceives the world as a grotesque nightmare but sees Saya as a beautiful girl. They meet and form a bond.
Furuya and Saya's relationship deepens as he hides her true monstrous nature from others, complicating his social connections.
Furuya learns about the chemical weapons attack that caused his accident and the larger conspiracy behind it.
Driven by his altered perception and attachment to Saya, Furuya commits violent acts to protect her and their secret.
The horrifying truth about Saya's origins and nature comes to light, culminating in a dramatic and tragic confrontation.
Depending on the player's choices, different endings explore the fate of Furuya and Saya, ranging from tragic to ambiguous conclusions.