I wanna explain why I drew this; Between 2015-2018 there was a very niche and obscure community of people that crossed One Punch Man and Undertale, and there's a shocking amount of art of said crossover. Someone even made a whole ass comic series showing Saitama in Undertale helping out the human with the events of the game, and that combined with a bunch of adorable art of Saitama and Frisk made me wanna doodle these 2 enjoy! :v