this is a story about 5 siblings that leave under the same roof 

yoona 

yoona is the baby of the siblings sometimes the older girls call her baby espacially taeyeon they dote on yoona alot and give in to her alot yoona studies in a top korean university that accepts only the top 0.1 %  students in the country yoona has the weakest immune amongest the siblings she also has asthma and anemia which prevents yoona from eating ice cream 

sunny

sunny is the 2nd youngest of the siblings she is the closest to yoona she opens her own ice cream shop called "the sunshine cream" yoona is her frequent customer but sunny does not allow her to eat the ice cream 

 hyoyeon

hyoyeon is the 3rd  youngest born she is a dance instructor at fire and ice dance acadamy she trains employable dancers 

yuri

yuri is the 2nd oldest she is very dependable is taeyeon's right hand woman 

taeyeon

taeyeon is the oldest she has the most say in the family she is very protective of all her siblings