Shiratama Sayako has never experienced much good luck. Since she was a child, she dreamed of becoming an architect. She studied hard, but she repeatedly failed her university entrance exams. Now, she is 30 years old and works in a field far away from her ideal job. One day, she happens to meet mysterious university student Ogasawara Taku. She tells him about her past dream of becoming an architect. Ogasawara Taku tells her that it is never too late and that she can still get accepted into a university. Inspired by their talk, Shiratama Sayako decides to study once again for her university entrance exams. After she studies so hard, she finally gets accepted into a university. There, Shiratama Sayako meets Ogasawara Taku again, who is a senior in the architecture department.

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