A tranquil tale about two boys from very different upbringings. On one hand you have Kai, born as the son of a prostitute, who is been playing the abandoned piano in the forest near his home ever since he was young. And on the other you have Syuhei, practically breast-fed by the piano as the son of a family of prestigious pianists. Yet it is their common bond with the piano that eventually intertwines their paths in life.

A bittersweet tale of puppy love, tragedy, and aspirations of pop-star fame. A spark of hope ignites to a blaze in twelve-year-old Mitsuki Koyama's life when a comical pair of magical beings appears to prove to her that dreams really do come true.
Young Mitsuki loves singing and dreams of becoming a pop star. Unfortunately, a malignant tumor in her throat prevents her from pursuing her passion. However, her life turns around when two surprisingly fun-loving harbingers of death appear to grant Mitsuki a temporary reprieve from her illness and give her singing career a magical push start.

The son of a famous pianist, music student Shinichi Chiaki dreams of studying abroad and becoming a conductor like his mentor. Unfortunately, his fear of flying grounds his lofty plans! As he watches other classmates achieve what he has always wanted, Shinichi wonders if he should quit music altogether.
Then one day he meets fellow student Megumi Noda, also known as Nodame. This oddball girl cannot cook, clean, or even read a music score, but she can play the piano in incomparable Cantabile style. And she teaches Chiaki something that he has forgotten: to enjoy his music, no matter where he is.

For the first 14 years of his life, Yukio Tanaka has been one heck of a boring guy. He has no hobbies, weak taste in music, and only a small vestige of a personality. He yearns for an exciting life, but his shy, and somewhat neurotic personality make him his own worst enemy. Little does he know that his life will be forever changed when he meets Ryusuke Minami, a wild and unpredictable 16-year old fresh from America, who happens to be in a rock-and-roll band named after his Frankenstein-like patched dog--Beck.

Every few years, the prestigious Seiso Academy holds a prominent musical competition, and only the very best students at the Academy are allowed to participate. Though all are eligible to apply, only students from the music department actually make it to the competition...until now.

Yaya's high school friends haven't been very nice. They call her "Yaya the cry-ya! Yaya the misfi-ya!" But no matter how badly they act, Yaya is just too naive and trusting to believe the worst of her friends.
Hard-rocking, butt-kicking Nana is just the girl to grab hold of Yaya's timid demeanor and turn it upside down. Nana exposes Yaya's "friends" as slime bags, doles out punishment, and does it all with style.
Can there be anything that terminally shy Yaya and hyper-confident Nana have in common? Well, for one thing, they're the same person...

From Manga Abyss:

Takami and Akira are childhood friends who attend the same piano classes. Compared to the rough and boyish Takami, Akira is more feminine and cute and is also more skilled in piano. Takami thinks of Akira as a younger sister, but one day, Akira suddenly kisses Takami and says he likes her…?!