A young couple is devastated when their son is killed by a falling tree during a windstorm. As the distraught father begins to look for answers into his son’s death, what appears to be a tragic accident turns out to have been the result of multiple blunders by multiple people.
Keita Orimo works at an apparel company and is on the layoff list. He is divorced and has a 9-year-old daughter. He is also a bit old-school and carries a flip phone. One day, Orimo's brain suddenly becomes like a smartphone. He can see text balloons flying by and he can even see messages for other people. His smartphone like brain leads him to get involved with trouble at his workplace.
Takuto Hirabayashi now works at a company, Kyohei Hano works at a trading company and Hajime works for an apparel brand. The three of them are friends since high school and live together in a share house. A day when they come back home they find a baby inside the house with the writing "It's your son". No-one of them wants the baby and they keep on blaming each other, but the child falls sick and they are forced to take care of him.
In 1930 and as a young child, Tsuneko Kohashi lives at Enshu in Shizuoka Prefecture. She has a happy life with her parents and two younger sisters. Things change after her father dies from tuberculosis. Her father asked Tsuneko Kohashi to take care of the family in his place. Due to financial difficulties, her mother Kimiko decides to move the family to Tokyo where Tsuneko's grandmother lives.
A high school girl finally gets her own apartment, but she has to share it with the most popular boy in school. No one can know they're living together.