本当のパパって誰?~三兄弟の溺愛バトル~

Six years after a wild one night stand, a single mom raises her sick son alone. When a wealthy grandpa spots the boy, his three billionaire sons all claim to be the father! Hired as their nutritionist, she faces her evil stepsister who wants her dead. As the three powerful brothers fight for her heart, who is the real daddy of her little boy?