It is assumed in a conversation between her and Saki Miyu on the rooftop that she has been abused by her drunk father after her mother's death. This is incorrect. When spoken to, Kokona will talk about how her father comes to her to cry about his debt problems. Her family is very broke due to a loan he took out to pay for Kokona's school tuition, accidentally becoming in debt with a group of loan sharks, called Ronshaku Loans. Kokona Haruka is also involved in compensated dating with a person who she has seen at least once in Shisuta Town. Kokona does this to pay for her father's debts. If Kokona's dark secret is bought, Yandere-chan will receive video footage of Kokona selling used panties to a boy from another school that can be used as blackmail.