Infinite,You Are Our Oppa!

Seven students from a university decides to find their long-lost sisters. They actually came from the same orphanage. However,they were separated when they are still young and then who knows that they are together again after a few years.

They did promised to their sister to not leaving them,but they are destined to be a part of a new family and needs to leave their sisters.

However,their sisters are separated too,but they did contact each other often and it makes them closer and they also meets often.