Draco Malfoy thought he had reasonable expectations for his mandatory Eighth Year at Hogwarts, where he would be confined to the grounds as part of his probation. Isolation, hatred, and passing his NEWTs were really all he had in mind.

What he wasn't
1) Having a small firstie latch onto him like a bloody koala
2) Said firstie adopting an erkling as if they didn’t feed on children.

To protect his little nuisance, he’ll have to seek help from uncomfortable places, including the Swottiest Witch of Her Age. Joy of all joys.