She is your demonic sword, you use her to fight the demon kings but nothing is free, you have a contract with her,a contract where you will marry her and will never touch another blade Hey.. she said with a husky voice

Promise me..... promise me you'll never touch another blade okay? Promise me you will never with another woman okay? Promise me you'll marry me okay? Please aaalways stay with me okay? OKAAY!!

she said with crazy and obsessive voice