Sakaino Hitomi is an honest lady from a well-to-do family. She is envied by everyone for being engaged with Akashi Keigo, a man with a good appearance, high income, high education, and kindness. Hitomi is about to get married but suddenly got attracted to a man, Manabu whom she met at a construction site.
Ozawa Hiromi, a second-year high school student, lives with her strict grandmother Takako who deprives her of all freedoms. One day, Hiromi faints and wakens to a new personality named Yumi who is the opposite of Hiromi in all ways. Can Hiromi stop Yumi?
Inspector Totsugawa of the First Investigation Division goes to Tsuruoka in Yamagata to attend the wedding of the son of Inspector Mukai, his former colleague who now works for the Yamagata Prefectural Police. While sightseeing at Mt. Haguro after the ceremony, he notices a young woman drawing him in her sketchbook. She introduces herself as Yuka Shiraishi and says she came to draw the Dewa Sanzan. Signing the drawing of Totsugawa next to the five-story pagoda with her initial, a 'Y' in the corner, she gives it to him as a present. The next morning, the corpse of a young woman who has been stabbed is discovered in a forest in Tsuruoka. When Totsugawa, on his way back, hears that a sketchbook signed with a 'Y' was found at the scene, he follows Mukai there. However, the body is not Yuka, the woman Totsugawa had met, and while no items pointing to her identity are found, the sketchbook is the same one Yuka had the day before.
Mifuyu is a high school student. Her mom suffers from a severe illness, which causes Mifuyu to spend most of her time taking care of her and doing housework. She doesn't think about her future after high school. Mifuyu's mom dies, her dad brings his girlfriend to their house and kicks Mifuyu out. Mifuyu goes to the home where her mom's cousin lives, in a high-class residential area in Tokyo.
High school student Yuki Hase wants to become close with classmate Kaori Fujimiya who is alway by herself. Kaori Fujimiya refuses to become close with Yuki Hase, because she forgets her friends every new Monday. Even though Kaori tells Yuki why she doesn't want to become friends, Yuki still wants to become close to her.
A young daughter (Mana Ashida) supports her father (Etsushi Toyokawa) who is diagnosed with Alzheimer's disease.
