The Osomatsu-san meme phenomenon stems from the 2015 reboot of the classic 1960s series Osomatsu-kun, reimagining the identical sextuplets as adult NEETs (Not in Education, Employment, or Training). The brothers—Osomatsu, Karamatsu, Choromatsu, Ichimatsu, Jyushimatsu, and Todomatsu—each developed distinct, often dysfunctional personalities that became ripe for internet humor. The memes typically revolve around their laziness, social incompetence, and the 'trashy' but lovable nature of their brotherhood. Since its release, the fan base has generated countless reaction images and situational parodies, often highlighting the absurdity of their daily lives and the stark contrast between their identical appearances and clashing egos.