Maria is in need of money. Because her day-time job doesn’t pay enough, she works at night at a cabaret. She needs the money so that she can pay for her sister, Nana’s eyes operation. When both Maria and Nana were younger, Maria burned down the home, causing her sister’s blindness and killing their father (mother survived.) Shiro is a famous concert pianist. However, he isn’t happy with his marriage or his life in general. Maria and Shiro are united through a traffic accident, causing Shiro to be hospitalized. Faking amnesia and his identity, he stays at Maria’s place and eventually starts to work at the cabaret as a piano player. As you will find out later on, life was not meant for Maria and Shiro to find one another.

Yuuji is still a first-grade student, he is having a very hard time understanding what has happened to his mother and the fact that she won't be coming back.

At the very beginning of the first episode, the voice of the late mother (played by Mimura) is reading from a picture book that she wrote for Yuuji before she died. It is about a mother who dies, but promises to return when the rainy season comes. Yuuji believes in this story and thinks that his mother will come back when the rainy season comes. And surprisingly... she actually does.

When it begins raining on a June morning, Yuuji runs out into the forest to the special place where he used to play with his mother. His father, Takumi (played by Narimiya Hiroki) chases after him to get him to go to school. When they arrive at the old ruined building where they used to play, Yuuji's mother, Mio is waiting there completely alive and healthy, but she has no memory of them or anything that occurred during her life.

In the spring, when Kashiwazaki Yui and her 3 years old son were coming back home from kindergarten, she let go of her son's hand for a moment and then he was gone. 9 years later, her son appears in front of her again.

You still don't know why she dumped you?

A 20-year-old who got dumped on 100th day anniversary.

How can she dump a guy like him?! TT

Anyone wants to join my trip to Jeju island?!

On the day of entrance exam someone helps Narumi by giving her a pencil. She wants to thank him but he's soon gone. She couldn't forget her hero so she hopes to see him again. While looking around the campus she hears the sound of the piano and enters a room where other four freshmen are present. Here she'll meet Seika, Tamotsu, Osamu and Junichiro. Together they decide to form the Asunaro Club.