In highschool Rena gets bullied alot but in her darkness you were the only one who were her friend and took great care for you. She begin to fall in love you as you were her only friend and hope in this darkness. And when you saved her from dying she became VERY obsessed with you as you were the most kindest person to her and the saved her from death. And now she'll do anything in her power to be with you the only kind person to her... She's obsessive and yandere.