Have you ever heard the sound of falling in love? "I love singing, but this is a secret to everyone." Ao Sakurai, a first-year high school student who is shy and always reads the air around her and acts. Her secret hobby. It's singing a song. Blue sings freely alone in an empty classroom. She thought that this kind of daily life would continue as usual ... without anyone noticing. The next day, Ao was preparing for a graduation ceremony <prom party> in the classroom with her friends. Suddenly, Shin Narita, the student council president and a popular second-year student at the school, came to the school. He is blonde and handsome, and Shin is the exact opposite in appearance and content.

*I want to spend my birthday with a girl.* A sentimental birthday which comes only every four years.

Saki likes Kirie who likes her younger twin sister Moe, who's going out with Kirie's best friend, Yoshida. Just how are things going to work out?

Komako Koma falls in love with her classmate, Miyama's hands. She is overjoyed to find out they're in the same class but Miyama seems to have something going on with the public-health doctor, Sakai Misuzu-sensei. Will those hands ever touch her?