The #TawawaChallenge originated from the popular Twitter illustration series and subsequent anime 'Getsuyoubi no Tawawa' (Tawawa on Monday) by artist Kiseki Himamura. The challenge involves balancing a smartphone on one's chest, inspired by a scene where the main character, Ai-chan, performs the feat while on a train. What started as fan art quickly transformed into a viral social media phenomenon in late 2016, with people around the world sharing their own attempts or drawing their favorite fictional characters participating. It remains a staple of anime internet culture, often resurfacing on Mondays to help fans beat the 'Monday blues' with a bit of humor and creativity.