Seohyun and her older bother Suho living on their own is very difficult, especially with the death their parents. Suho's friend suggests to move in to their house, maybe it's a good idea to Suho, having his friends protect his younger sister. But Suho didn't know his closes friend was Seohyun's ex. Once they enter the house, Seohyun greets all the members cheerfully until she meets him. Her ex-boyfriend was there, which means awkwardness but when she starts living in the house will she find new love or will she fall I love with her ex again?