The Insect Shop's Bride

Volume 3 of ***The Mushiya Series***

After Hinako helps a bullied girl named Norie, she attracts the attention of the bullies, Maki and others. She tells her homeroom teacher about it, but instead she is accused of telling on him, and the whole class treats her like an insect. After months of torment, she commits suicide by hanging herself in the woods, the insect dealer finds her body and revives her with the "Vengeful Bug..."

This is the most disgusting splatter sensation the world of 90s horror manga has to offer!