Hyper Baby

Maria, a high school student, is on her way to visit her sister at the hospital. Her sister has just given birth to a baby boy, making Maria a new aunt. However, things take an unusual turn when she notices a strange yet incredibly cute boy at the hospital who seems very interested in her new nephew. This boy is always around, and it appears only Maria can see him. Is he a ghost? A demon? Why can only Maria see him? Adding to the confusion, Maria encounters another strikingly handsome guy in the hospital's lobby. He’s tall and suave, holding a bouquet of roses. He too shows interest in the birth of Maria's nephew and hands her the flowers. Maria is bewildered by all this attention her nephew, Masaki, is receiving. Who are these mysterious men? The first boy reappears later at Maria’s house, specifically in Masaki’s nursery. To Maria's shock, he materializes right out of baby Masaki's body! Is this a dream? Why is this boy emerging from within the baby? He pleads with Maria to protect her nephew but doesn’t specify from what. He also insists she meet someone named Ichirou Kouzuki. Who is this person? Could he be the other man from the hospital? Why is everyone so intrigued by Maria’s nephew?