Formed in 2011, the band currently consists of vocalist Hiroki Moriuchi, guitarist Teruki Nishizawa, bassist Nobuaki Katō, and drummer Shōhei Sasaki.

Their fourth studio album Antithese (2016) ranked 4th on Oricon chart,[9] and directed their first Nippon Budokan live show, gathering 12,000.

Having known Hiro through Pay Money to My Pain's vocalist K, producer Nori Outani suggested him to Sho in August 2011, when he was still mainly active in his previous band Fromus together with drummer Masack and bassist Nob.

Only a little later, the newly founded formation decided to add another guitarist and Hiro remembered Teru who he had already tried to start a band with in their high school days.

[10][11] Their band name "My First Story" had been suggested by Pay Money to My Pain vocalist K. In October 2011, they appeared in a music event sponsored by Sanei Shobo Co., which publishes the street fashion magazine Book (Ohlie), and performed in public for the first time.

On February 5, 2014, the first live DVD The End of the Beginning Tour Final Oneman Show at Ebisu Liquidroom released.

[16] Despite his absence onstage with his band members, Sho remains present in My First Story's following albums, credited as composer or sound producer.

After Sho's suspension of activity and Masack's withdrawal, the first live performance with that new band constellation, "Highest Life Party Vol.

The album's track "Let It Die" was used for the soundtrack of the eponymous PS4 game Let It Die,[21] "Reviver" was part of the soundtrack for the Hortensia Saga: Ao no Kishidan, "Though being the happiest person in this world is something I may not be able to do..." (この世界で一番の幸せ者にはする事など出来ないかもしれないけど..., kono sekai de ichiban no shiawase-sha ni suru koto nado dekinai kamoshirenai kedo...) served as theme song for the Japanese TV-show Buzz Rhythm, "Smash Out!!"

On December 23, 2017, My First Story held their "MMA" Tour Final "The Premium Symphony" at Makuhari Messe in front of 18,000 people and performed 23 or their songs together with a live orchestra and choir.

On March 16, the band was announced to open for Fall Out Boy's MANIA Tour in Nippon Budokan, Tokyo on April 26.

[23] On March 23, the DVD of "MMA" Tour 2017 Final One Man Show "The Premium Symphony" was announced to release on May 23.

[24] Another special that came with "The Premium Symphony" was a second DVD including bassist Nob's one man show ~This is Truly Alone~ (〜これがホントの Alone や〜, ~Kore ga honto no Alone ya~) that was held on March 7, 2018 at Tsutaya O-East, Tokyo.

The band's single "Mukoku", originally scheduled for release on July 31, 2019, was pushed back to August 14 in order to remove the track "Underdog" which featured a collaboration with Rize and The Bonez vocalist Jesse who had been arrested for marijuana possession.

[25] The band's single, "1,000,000 Times", was released on July 1 in Japan featuring Chelly from Egoist and including a track called "Minors".

[29] In 2024, the band performed the opening and ending theme songs, "Mugen" (Dreams) and "Tokoshie" (Eternity) with Hyde, for the fourth season of the anime Demon Slayer: Kimetsu no Yaiba.