Have You Heard... [ Hanako x Reader ] :Toilet-Bound Hanako-Kun:

Have you heard of a rumor about a ghost named Aizo who creeps in the halls? It is said that this ghost appears every day during lunchtime and after school, knocking on every door in search of her true love...

If you hear her weeps, you must run away from her voice. If you don't, you will be sucked into her heart and never come back...