Toma is an unhappy toddler whose mother passed away. His life changes when he sees a male whom he calls "Mama." This child of a Yukuza boss has latched on to "Mama", dragging this struggling tourist into gang life. Toma is the star of this story. He is inquisitive and smart. He has no intention of letting his mama go. The dad, Daiki, is willing to let mama temporarily stay to keep a peaceful household. "Mama" wants Toma to be a kid and have a normal life while dad struggles with this new relationship. This story is funny and sweet. It's a light read thanks to Toma.