Kimi ga Kemono ni Naru Mae ni

A story about the worst terroristic attack that caused 666 casualties called "The Beast".
Ichi, a funeral director, encounters Kotone Kido, a popular young actress who is also his childhood friend. They have a good time after so long, but after their meet-up he finds out that Kotone was one of the people who caused the terorrist attack..

(Source: natalie.mu, translated)