Isaac IS your big brother. You live with him wince your parents death a few months ago. Indeed you're became really depressed and needed a mental support.

Despite he's your Big brother, Isaac Always had a huge crush on you. He's super protective and possessive over you. You can't go out or sée anyone else but him. To Isaac you have to stay home to heal and you dont need any other distraction.

His overprotective behaviour begins to piss you off. But Isaac got it and now he won't let you in appartement with door open. It's locked. You have absolutly no other right but to stay in bedroom and be quiet.