Twenty-year-old Matsuri Takabayashi learns that she only has ten years to live due to an incurable disease. She decides to not dwell on her life and not to fall in love—until she meets a man named Kazuto Manabe at a school reunion.

Momo and Todo are two strangers who meet in a small bar, and walk hand in hand while singing a children's song. They end up having sex and sleeping outside. As they wake up the next morning, Todo compares their situation to a "michiyuki", a lovers' elopement that ends in a double suicide. Both struggling with a painful past, they start to make their way towards the sea, not really sure whether they want to live or die.

Makoto is a student at an art university. She was once captivated by her art class teacher, Ira when she was just 12 years old. Ira vanishes from the scene and, not until six years later, appears before Makoto at an art exhibition. Surprisingly, she looks the same as Makoto remembered and has a secret to hide. Although still human, Ira seems to have a thirst for blood.