Yoshimura Yuri works on the night shift at a convenience store. Depressed, she has given up on life, and numerous times, she attempts to commit suicide. Yuri is haunted by her past; back in school, she cut herself, but her mother, instead of caring, accused her of doing so just to attract attention. Now, she is required to visit the doctor for monthly check-ups. At the convenience store she works at, she meets Nagasaka Hiroki, an optimistic university student, who is curious about why she acts so negatively towards life.

Nakagawa Kana has worked hard all her life to become a successful competitive swimmer. Under her father's pressure, she is aiming to become a representative at the next big swimming competition for her school. Life is much like a swimming race, every second counts, and to Kana doing anything else other than being the best is pointless. One day, she gets caught in one of her shoplifting acts – something she does only for the thrill rather than for the product – by her childhood friend, Daisuke. Without much consideration, she pulls him to a nearby hotel where they spend the night together. However, Kana does not expect what happens afterwards would affect everything she has worked for.

Four years ago, Satou Yoshimi underwent plastic surgery, throwing her past away in the process. Now, she is the top girl at an extravagant hostess bar and with the support from a wealthy client, she has everything she has ever wanted, from apartments to necklaces. Yet even though she has never been more satisfied, she feels that something is missing in her life. Suddenly one day, she comes across a pet store, where she quickly develops an admiration for a stray puppy. Slowly, with the help of the pet store employee, she discovers what was truly lost.