
The following day, Lofi Girl's YouTube channel uploaded the character's entry animation with the title "Synthwave Launch 🌌 - Lofi Boy POV", confirming the new character's name. The community dubbed the unnamed boy, "Synthwave Boy" "Synth Boy", or just "Lofi Boy". On 11 April at 5:00 PM UTC, the blue room could be clearly seen, and a new character entered with a small dog and began typing at a computer. Over the course of 24 hours, the video slowly zoomed in towards the open blue window. The audio music stream continued with a still visual background, but without record and track labels. The extensive teaser campaign accompanied the stream's launch: On 10 April 2023, the animation of the Lofi Girl and her cat disappeared. On 11 April 2023, the channel launched a third live stream, "synthwave radio 🌌 - beats to chill/game to", featuring a boy with his pet dog next to him sitting in front of a desktop computer. Following the incident, Lofi Girl criticized YouTube for not investigating the claims more thoroughly and for not providing content creators an opportunity to appeal false claims. According to a spokesman for FMC Music, the copyright claims were filed by hackers who had gained access to the company's YouTube account. YouTube later confirmed that the copyright infringement claims were "abusive" and that the claimant's channel had been terminated. The two streams had nearly 800 million combined views and had been streaming continuously for about 21,000 hours each. On 10 July 2022, YouTube took down two of the channel's streams ("beats to relax/study to" and "beats to chill/sleep to") after receiving a Digital Millennium Copyright Act takedown request from Malaysian record label FMC Music Sdn Bhd. The channel celebrated this by having a party event in the chat. The stream that was on at the time had been running since 22 February 2020, and had over seven million likes. On 2 February 2022, the channel reached the milestone of ten million subscribers. The YouTube community posts explained how Lofi Girl had become the icon of the channel, and that it would fit as the new channel name. On 18 March 2021, six years after the creation of the channel, it was announced that the channel would rebrand from ChilledCow to Lofi Girl. The original live stream that was stopped by the take-down was 13,000 hours long, making it one of the longest videos on YouTube. In February 2020, YouTube briefly removed the channel without explanation, but reinstated it after a public backlash. The music in ChilledCow's live streams was either released through the ChilledCow label or was used with permission from the artist. On September 2017, the livestream was later reinstated with a custom animation of a girl studying.

The live stream was taken down by YouTube between July and August 2017 for using footage of the character Shizuku Tsukishima studying from the animated film Whisper of the Heart (1995). ChilledCow began streaming lo-fi hip hop music, branding it as relaxation music for those who are working or studying on 25 February 2017. The YouTube channel "ChilledCow" was created by Dimitri on 18 March 2015. It provides livestreams of lo-fi hip hop music 24/7, accompanied by a Japanese-style animation of a girl studying or relaxing. Lofi Girl (formerly ChilledCow) is a French YouTube channel and music label established in 2017.
