Severus Tobias Snape, at the age of 43 is the headmaster of the Hogwarts School of Witchcraft and Wizardry, but he is also a single father of three children with completely different personalities.

Katarina, his oldest child, a 16-year- old girl and a 6th year student. Being the older sister, she has the responsibility of keeping an eye on her younger brothers, as well as being the seeker for the Quidditch and prefect of Slytherin. She is a very big tomboy to be Severus' only daughter, she is very protective of people she cares about, independent, responsible, respectful, intelligent, brave, slightly manipulative and cunning; she does not like to ask people for help.

Severus Jr, his second oldest child, a 15-year-old boy and a 4th year student. He always prefers to follow his own rhythm and does not usually pay much attention to his younger brother, but yes to his older sister, he admires his sister very much and cares a lot for his younger brother even though he refuses to admit it. He is a very indifferent, cold, sarcastic person, not very affectionate, intelligent, cunning, very observant, but only to the things that interest him and very proud; he does not like to show his weak side.

Alexander, his youngest child, a 12-year-old small boy and a 2nd year student. A very sweet boy with little common sense who is constantly in trouble. He is a very crying person, affectionate, very clumsy, very manipulative, intelligent, outgoing, self-taught and energetic; he hates not getting what he wants to the point that he doesn't mind breaking the rules to get it, even though he always ends up in a lot of trouble because of it.

Follow the adventures of these three siblings and the constant problems in which they end up involved during the school year at Hogwarts, and discover the abilities that these three children will develop throughout their day-to-day life. Warning contains spanking.