Jounetsu no Keifu

Helen is left alone after her father's death and takes a live-in nanny job, where she is treated poorly by her employers. During a trip to the Caribbean with them, she faces a problem at the airport and is rescued by a stranger. As she starts to express her gratitude, she becomes stunned upon hearing his name. It's impossible—he is the man her mother left with. Shocked and repulsed, she attempts to flee, but he refuses to let her escape.