わたしの葬式　呪いのへび教室　黒髪の呪い

Synopsis

(from ebookjapan): If you kill the snake, you will have a terrible haunting.... As her classmates throw stones at the snake, Mika recounts a horrifying incident from six months ago. It happened during gym class. Mika, who hates snakes, is startled by a white snake that suddenly leaps into her field of vision, and she forgets herself and kills it.... Note: Volume 1 contains *The Cursed Snake Classroom* and another work, Volume 2 contains [*Curse of the Black Hair*](https://www.mangaupdates.com/series/vi9apr9/kurokami-no-noroi) and other works. The two volumes are digital editions of Koga's Tairiku Shobo tankobon. *Curse of the Black Hair* was serialized in *Funny*, the sister magazine of *COM*.