Ninja Sex Party (often abbreviated as NSP) is an American musical comedy rock duo consisting of singer Dan Avidan and keyboardist Brian Wecht.

[3] In need of a band member, Avidan was introduced to Wecht, who was the musical director of a comedy troupe in New York,[4] by a mutual friend at the Upright Citizens Brigade Theatre, Julie Katz, a member of Wecht's comedy troupe (who would later be featured in their music video "The Decision"), to whom Avidan had asked if she knew any musicians.

"[5] They began performing together that summer, appearing in various film festivals, including SXSW, Dragon Con, and the LACS.

[14] All their early music videos were directed, shot, and edited by Jim Turner, who was the only person paid for his involvement; all other people participating were friends working for free.

[20] In July 2014, Ninja Sex Party performed a concert for San Diego Comic-Con at Petco Park.

[21][22] In 2015, two singles were released by the band TWRP, collaborating with Ninja Sex Party, titled "The Hit" and "Baby, NYC"; from that point on, TWRP became NSP's backing band on both live shows and studio releases, while also serving as their opening act on live shows.

The video featured actor Finn Wolfhard, a friend of Avidan since he had appeared on Game Grumps in January 2017 and a fan of the band, as a younger Danny Sexbang.

The duo then went on to tell RIFF Magazine that the album would also include covers of songs by Rush, Def Leppard, the Bee Gees, and Michael Jackson.

[41] On September 17, 2018, Ninja Sex Party, along with TWRP, performed a censored version of "Danny Don't You Know" on the late-night talk show Conan as a musical guest, making their live television debut.

[45][46] On August 1, 2019, German YouTube personality and musician Flula Borg released the song "Self-Care Sunday", featuring Ninja Sex Party.

On December 14, 2019, the band released "The Decision Part 2: Ten Years Later", a music video celebrating the band's 10 year anniversary and acting as a sequel to "The Decision", Ninja Sex Party's second-ever song originally released on December 14, 2009; the video also revealed the title of their next original album, The Prophecy.

On May 28, 2024, the band posted on their social media, with the title "You are CORDIALLY invited to "NSP's 15 Year Anniversary: A Digital Concert Experience"!!!".

The extras that fans could purchase were tickets to their Q&A session after the performance, and a signed CD and LP of their upcoming "Masterstrokes" album.

[57] Wecht manages all Ninja Sex Party social media accounts, as well as Starbomb's and formerly Game Grumps.

[58] The mobile game Shooting Stars features a boss named Grump Dan, who is a reference to Danny Sexbang.