Back by popular demand, the My Blue Sky saga continues. Whatever happened to the spunky Nazuna, her hale baby, Taiyo, and Kento, the man who left them for a life of professional boxing? When we left off with Nazuna two years ago, she had decided to keep her baby and stay in Tokyo after being abandoned at the alter. Life as a single mom wasn't easy, but she and her son managed to make a cozy life for themselves. This time around, Kento and Nazuna have now reconciled, and although not married, they live in separate apartments across the way, each pursing their dreams. Taiyo, about to start fourth grade, enjoys the support of both his parents, with an out-of-the-ordinary family situation working surprisingly well. Reality crashes in when Kento falls in love with another woman. Reserved and shy, Koyuki is the polar opposite of the energetic, straight-talking Nazuna. For better or worse, Nazuna and Taiyo are forced to take a second look at their unique family structure.