Migi To Dali

Briefly about Migi To Dali manga:

In my heart, there is a small angel. That's why I call him Migi To Dali (The Little Angel). The boy's name was Hitori. A stork brought the angel into the lives of a middle-aged couple who were not blessed with children. His parents were kind and caring, but he knew he could not tell them about his secret... Then one day, while out for a walk together, his parents happened upon an abandoned newborn baby girl and immediately took her home to raise as their own... The years passed and Hitori never forgot about