The group stood on the second floor behind the shelves which blocked the entrance of the second floor from the first.
They had successfully sent all the monsters outside of the store and were ready to make their escape.
They slowly dragged the topmost shelf down to make a way for them to get past the blocked entrance.
They took special care of not making any noise while making their way out. They had successfully shifted the shelf down and now, they could easily pass through the shelves.
Raiden made the move first. He climbed over the now, two fallen shelves and made sure to check the other side just in case. When it was clear that nothing laid on the other side, he went ahead to land on the stairs.
He put his legs on the railing by the stairs and slowly let his body down without making any noise. Jun followed him next and came down by exactly following Raiden's moments.
At last, Sheila came, too. She didn't make any noise and safely landed on the stairs.