Story of Undertale is a fan-made song based on the 2015 game Undertale, and it became a long-running meme online for its unusual lyrics, delivery and earnest tone. Clips of the song spread across YouTube, TikTok and meme edits, where creators used them both affectionately and ironically. It stayed popular because even a few seconds are instantly recognizable to people who grew up around mid-2010s internet humor, Undertale fandom videos and remix culture.