A pioneering roboticist awakens in 2025 after decades in cryosleep. To change the past and reunite with his adopted sister, he seeks a way back to 1995.

Akari is a first grade high school student. She is positive, realistic and outgoing with romance. Akari though is not good at expressing her feelings. She become friends with Yuna, who attends the same high school.

A high school girl wakes up each day with no memory of the day before. When she agrees to date a shy classmate, Toru, he begins to fall for her—despite her rule against falling in love.

Meiko and Taneda are a couple graduated from university two years ago. Unhappy with their lives, Meiko quits her job and encourages Taneda to have his band become professional.

College sweethearts Riku and Minami marry. He becomes a novelist while her singing dreams fade. After a fight, she vanishes. Suddenly, he's just an editor, and a singer named Minami Maezono exists-but he's never met her.