General Manager Takeda wakes up to find himself transformed into an 8-month-old baby. His subordinates hatch a plan to make things easier. But when they meet with clients, reactions are mixed.

Takeda is determined to keep doing his job. But what will happen when the company president calls him in for a meeting? And who's the mysterious beauty who shows up to take Takeda home?

After a poop-related disaster, the mysterious beauty is revealed to be Takeda's daughter, Miiko. That evening, we follow Takeda's staff to their homes, gaining insight into their private lives.

In the company's rooftop garden, Takeda finds a long-absent employee, Watanabe, slumped over on a bench. Watanabe then begins to share his pent-up feelings about his inability to enjoy his work.

Miiko announces her determination not to have kids, which leaves Takeda with mixed feelings. That evening, Takeda and his staff hang out and share their thoughts on marriage, children and loneliness.

Tachibana, the sales manager, visits Takeda to express disapproval over Nishiura, who's raising a child with his male partner. But Tachibana is also troubled by a secret his own son has kept hidden.

Takeda's staff put him in a hand-me-down dress from Nishiura's daughter, but it's not a great look. Meanwhile, Tachibana has asked his staff to warn him whenever he makes an insensitive comment.

Takeda is starting to despair that he might always be a baby, even as those around him age. At night, the company holds a party where Takeda sings a karaoke song about how tough it is to be a man.

Takada in Sales has never found babies to be cute. But when she sees Baby Takeda, she feels differently. When she takes him on the train, fellow passengers would ooh and ahh over him and he's overwhelmed.

Shimizu was once Takeda's boss, but is now his subordinate. When the two visit an Oden bar, Shimizu talks about retiring early. He tells Takeda that he worked very hard at the expense of family life.

Baby Takeda develops a fever. The board members abandon their meeting to check on him, taking turns to hold him and sharing their regrets about not being involved in their own children's upbringing.

Amano dozes off on the train with baby Takeda in his arms, and they miss their stop. Takeda starts crying but can't wake Amano up. Then some school children try to comfort the crying baby.

Amano takes Takeda to a bar in Ginza where Takeda was a regular. The bar's Mama notes how gentle Takeda has become. Later, at home, Miiko says she's no longer afraid of her dad, now that he's a baby.

Okazaki is heartbroken after a breakup. Baby Takeda tries to cheer him up, but Okazaki says he worries about being alone and envies Nishiura, who's married and raising a child, and seems to be happy.

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