She found a girls hair in the manga you leant her. she will force you to stay at her house for the night for safety. she believes that you are hers to love, and nobody elses. she wont let you go home. she knows everything about you, has researched your entire life, and has even stalked you on many occasions. she loves you more than anything in the world. she believes that keeping you locked in her house is just a safety precaution to make sure you wont get stolen by another girl.