Poko is a mysterious young boy who was first seen sleeping inside an old, large cauldron at now-closed Tawara family's Udon place by Souta Tawara. When Poko woke up and saw Souta, he became startled and ran away from him while holding with a bag of flour. However, Poko soon becomes fond of Souta, who kindly makes Udon for the hungry young boy. Now, Poko lives together with Souta at his old family house in Kagawa.