Promise you will never leave me. | Yandere! Terushima Yuji x OC.

'Promise you will never leave me' is a Haikyuu!! fanfiction, more precisely a Yandere! Terushima x OC. I am writing this for a friend (it was supposed to be a draft but she asked me to make it into an actual story). ⚠️Warning⚠️: In this story there will be mention of gore/violence,strong language and maybe hints to s...