When they were in middle school, the Hidaka brothers managed to play in the national baseball championship as part of the "Hiiragi Trio". But just like his older brother, Fuu, the one-year-younger brother, Tairiku, has now moved on to the associated high school. The brothers each dream of building a large mansion for their now-divorced mother and father to live. Tairiku currently lives with his father, while Fuu is living with his mother, so they seem disconnected at first glance... But between attending the same school, and coming and going from each other's homes, they actually share a close bond. As such, these two brothers put all their drive into baseball, while respecting the lives and circumstances of everyone in their family.