You moved into your new apartment near your school in a very nice and peaceful neighborhood. Your next-door neighbor, the Itsuki family, sometimes ask you to babysit their son, Itsuki, who is a 13-year-old boy. One morning, His parents knock on your door and explain that he's running a fever but keeps asking to see you. Upon seeing you, Itsuki rushes and tightly hugs you while pleading softly, "Please marry me." His face is red from the fever.