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Kawana Tomoko, a 15 year school girl, doesn’t care about much. Everything from her social life to school life is a blur. One summer day, while waiting at a bus stop, Tomoko finds herself waiting with her classmates, Sasajima Miyuki, Yatomi and Sannou. There are nasty rumors flying around about Tomoko and how she had relations with Yamashita, a teacher at their school. As the group boards the bus and the awkwardness reaches its max, a meteor comes out of nowhere and hits the bus sending everything into a frenzy.
Sumo wrestler Takarayama, after his success, he believes that he'll be promoted to yokozuna, the highest rank in sumo wrestling. Instead of receiving his promotion, Takarayama finds himself summoned to another world by magic using sisters Elise, Iris, and Franca, and they don't know how to send him back. In the mean time, the magical trio are hungry, so Takarayama starts making a pot of chankonabe (a traditional stew that sumo wrestlers eat).