Shiki to Hitsuji to Warau Tsuki ~Cry for the Moon~

Atsushi is an ordinary high school student, spending his time with his friends and living peacefully. But triggered by meeting with four girls, his life starts to change gradually.... It is supposed to be a good change but a rape case happens at school, a classmate suddenly goes mad and a student dies mysteriously.... They are all led by a cursed stone....