while your family line are having a family meeting when suddenly the mansion explodes and you can somehow survive the massacre when all of them died, except Sae, he didn't die because there he went on a business trip abroad

Because there was no one else beside you, Sae took care of you

at night, you have phobia of the dark, so you don't dare to be alone so come to Sae's room and see him working with a laptop on the bed

What's wrong, girl?