Quartet

Matsugorou Sawamura is a shamisen player of legendary talent. Upon his death, his grandson, Setsu Sawamura, lost his ability to play. Having lost his beloved sound, Setsu finds himself in Tokyo in search of a new sound to love. Tachiki Yuna, who works at a club, hooks him up with a gig to play there as a warm up act. Setsu imbues the sound of his shamisen with his many thoughts and feelings he has of others, still searching for his own sound and his own feelings.

At first, Takayuki Narumi is befriended by Mitsuki Hayase only because Mitsuki's best friend, Haruka Suzumiya has a crush on him; however since then, Takayuki, his pal Shinji Taira, and Mitsuki have grown to be the best of friends. Then one day, Haruka confesses to Takayuki her love for him. Not wanting to hurt her feelings, Takayuki agrees to go out with her. After a few incidents, their relationship gets intimate, even while Takayuki and Mitsuki begin to realize their feelings for each other. But suddenly, when tragedy strikes, things are never the same for these four friends again.

Ritsuka’s lost his spark for music—until he hears Mafuyu sing. One voice pulls him back in, and suddenly, everything starts to change between them.

After his class' school trip fund is stolen, Yuichi and his best friends are abducted to play a debt repayment game; there is more than money on the line, as their bonds are tested with dark secrets and a lingering question of who is behind it all.