Papa to Boku to Kazoku ni Natte yo

"Daddy doesn't smile anymore. Do you think he hates me?"

After losing his wife, Tsubasa spends his days with his five-year-old son Sora whilst trying to balance his job, household chores, and childrearing. Wishing to raise his son to be a respected adult, Tsubasa continues to show a strict side to his son and gradually loses his smile. However, it is at this moment that the straightforward and sociable Hiro moves into the same apartment. Upon witnessing the demanding life Tsubasa lives, Hiro decides to lend a hand, but for Tsubasa who doesn't know how to rely on others, will Hiro's efforts reach him...?