Pendant of the Lost Girl

Daisuke Yashimira, a 15-year-old boy looking for fun in his dull life. One day, he hears on the news about the death of a girl named Minami Tsubasa. Then some days later, on the way to school, Daisuke finds a pendant laying on the ground with the name Minami. The odd thing about it was the date on the pendate which showed 8/14/13. Days later, he begins to see her wandering spirit.