Takuto, our protagonist, shares a house with his friends from high school – Kyohei and Hajime. He comes home to find a baby sleeping peacefully in the room. When the other two residents also return, they read a letter that has been left on the desk. "This is your baby". Although they're not quite sure what to do, the young men begin to feel responsible and they appear to make a decision to raise it together. However… The three young men – afraid of learning the truth - take on the task of raising a baby in this slapstick comedy drama. How would react if you suddenly became a father?