Dark Rain is a multinational post-hardcore band from Passaic, New Jersey. The group was founded by rhythm guitarist and vocalist Alasteon & former drummer Finnsvpy during somewhere around the fall of 2022. The band's old name used to be "Jak rozpętałem freaky wojnę światową" ("how i started a freaky world war") but the original title is "Jak rozpętałem II wojnę światową" (How I Unleashed World War II) but now changed to "Dark Rain". The band currently consists of rhythm guitarist and vocalist Alasteon and bassist and unclean vocalist Noctabble.

Dark Rain was formed in 2022 in Passaic, New Jersey by friends who were otakus. Alasteon and Finnsvpy. The both of them met on Steam in 2020, due to the pandemic happening. Somewhere around the fall, Alasteon started to make a band with Finnsvpy, because they wanted to do something not boring basically. He made Finnsvpy play drums because Alasteon viewed him as the perfect drummer and looks like he listens to the same music taste as him.

In 2024, the duo had no idea what to do with their band because they didn't have any friends who would be part of the band. Alasteon recruited his best friend from his high school to play and learn bass Noctabble & second, he brought nicolasbrehm to be the lead guitarist in the band.

In 2025, nicolasbrehm wasn't progressing musically with the band and had to be replaced with Alasteon's twin brother Itachippi and took his place as lead guitar. nicolasbrehm left the band due to creative differences and finding the band "immature", leaving Alasteon, Itachippi, Noctabble & Finnsvpy as the remaining members and would continue on as a 4-piece band without nicolasbrehm. Continuing as a 4-piece band, Alasteon, Itachippi, Noctabble & Finnsvpy did not know what to do, even Alasteon was stressed out and couldn't find anyone to join his band but he didn't give up.

kxora had drawn the attention of Alasteon, with Alasteon stating that "it had to be kxora" for whom he was praised for his much greater vocal range and since he was inspired by Dickie Allen & Tom Barber. He agreed to join the band due to his amazing unclean vocals. Alasteon felt that kxora's introduction to the band was "the right choice to make", adding that [I think kxora is] an incredibly talented vocalist, from the multiple wide range of screams that Dark Rain obviously needs and will continue to have, and his singing and range is out of this world.

Alasteon & kxora announced that they were producing a 3 sequel albums, which was to be released in December and different months.

In 2025, nicolasbrehm confirmed his return for the band.

In 2026, Dark Rain went through yet another lineup change with Finnsvpy and nicolasbrehm leaving the band due to internal conflicts but also no official announcement had yet been made by the band and no reason was given for their departures.

On Finnsvpy's departure from the band:

On January 2, 2026, Alasteon announced their departures leaving the band on Instagram.

On January 5, 2026, Finnsvpy launched his new band Reign in the Frost.

On January 21, 2026, Clean vocalist and rhythm guitarist Alasteon announced that there would be a new drummer and new guitarist. HauntedKissez was revealed as the new drummer, and 2natollis was revealed as the new guitarist, one of Alasteon's best and favorite friends, thinking that they might be the perfect one for his band and thinking the two of them will be progressing musically well with the band.

Dark Rain's has been described as a mixed combination of post-hardcore, pop-punk, experimental rock, emo, metalcore, industrial metal, deathcore, alternative metal, screamo, neon pop-punk, electronicore, pop screamo and easycore.

Dark Rain's influences are Alesana, Celldweller, Taking Back Sunday, Blink-182, Bullet for My Valentine, Eyes Set to Kill, Underoath, Chiodos, Fall Out Boy, Galneryus, Frei.Wild, 5 Seconds of Summer, Bring Me the Horizon, The Downtown Fiction, Woe, Is Me, Greeley Estates, blessthefall, Volumes, ItaloBrothers, Thirty Seconds to Mars, LoveHateHero, Sleeping with Sirens, One Ok Rock, Pierce the Veil, Dance Gavin Dance, Make Me Famous, Sum 41, A Skylit Drive, From First to Last, Norma Jean, At the Drive-In, Trivium, The Red Jumpsuit Apparatus, Three Days Grace, and My Chemical Romance.

Alasteon cited Michel Teló, Deryck Whibley, Enrique Iglesias, Ryan Tedder, Matt Heafy, Jeremy McKinnon, and Matthew Tuck as seven of his favorite singers for his sung and screamed vocals.

Clean vocalist and rhythm guitarist Alasteon is a self-described "pop-punk/emo/tsundere kid" while screaming vocalist kxora is a "total metalhead". The band has cited an array of rock and metal bands, such as Whitechapel, As Blood Runs Black, Between the Buried and Me, Chunk! No, Captain Chunk!, AFI, Secrets, Converge, The Amity Affliction, The Black Dahlia Murder, Suicide Silence, Crown the Empire, The Butcher Sisters, Sleep Theory, There for Tomorrow, Bury Your Dead, The Devil Wears Prada, Ice Nine Kills, Lorna Shore, We Butter the Bread with Butter, The Used, Parkway Drive, A Day to Remember, Silverstein, Asking Alexandria, Knocked Loose, Nightmare and Architects.