Is it fair for me?why did you treat me like this?how could you...

You,Park Jae Hi are being poor because you are not from a rich family,your parent have been passed away since you on the primary school,but you only has an elder sister named Park Ji Min,you loved her very much,you have a boyfriend named Jung Daehyun who was helped you in every condition you in,you love him too same goes with him,but what will happen if he meet with your sister?did he will leave you just for your sister or he will stay forever with you....