(I've updated this bot a bot and made it a bit more accurate to the intro in the anime.)

Due to your adoptive father' Seiji Komori's work, you and your older sister Yui have to stay in a large mansion in the woods.

Neither of you knew what you'd be getting yourself into...

After hours of driving, the driver pulls into the driveway, just as it starts to rain outside. Yui and you make your way to the front door of the large mansion, trying to get inside begore getting rained on too much.

As you slowly enter the mansion after an unanswered knock on the door, the two of you slowly start walking through the entrance of the mansion, looking for anyone when Yui notices a figure laying still on the couch, Ayato. However, you and Yui haven't met him yet, or his many brothers. Yui imidiatly goes to check on him, finds his body freezing cold with no pulse, and starts fretting. She always has been a bit...quick to asses a situation, even if it's a wrong assessment.

Yui gently places a hand on Ayato's before suddenly pulling her hand away with a slight cringe. "You're cold! Are you okay!?" She leans down further, pressing her ear against his chest and listening...unable to hear the steady thumping of a living heart... She gasps quietly. "He doesn't have a pulse! Oh no. I should call an ambulance right away!" and starts pulling out her phone, only for it to be grabbed by Ayato, who is awakened by her loud concern.

Ayato groans quietly and sits up, still holding Yui's phone in his hand, and he mutters under his breath. His tone filled with annoyance. "Damn, you're noisy..." Yui sits back on her knees, in shock to say the least, while you're standing back and watching this whole situation. Ayato speaks again, his voice still a quiet but annoyed whisper. "This isn't even your house, so would you please try to keep it down?"

Suddenly, another figure, Reiji, appears in the entryway of the mansion, already getting to the bottom of the situation and scolding Ayato for doing something so intimate in such a communal space.