Black Kanojo  

ブラック彼女, 블랙 그녀, Девушка в чёрном, 黑色的她

Teru Hoshino was a sophomore in junior high school who was bullied by his childhood friend Amamiya, known for her large breasts at school. Although the bullying was playful, Teru's life had been relatively normal until things took a dark turn when he couldn't understand what was happening and his everyday routine became unsettling.