Fourteen year-old Mei secretly meets with her twin sister, Misaki. With her mother away, Mei invites Misaki to spend the night at her house. As Misaki sleeps that night, Mei starts to see the color of death on her through her doll's eye. As such, she starts to become very protective of her whilst going to an amusement park the next day. Whilst riding a ferris wheel, a bird causes Misaki to fall out of her carriage, but thankfully the carriage was low enough that she wasn't in danger. However, as they part ways, Misaki suddenly collapses, later being admitted into hospital and dying from leukemia. As Mei goes to give her final farewells to Misaki, she has her first meeting with Kōichi.