Why did Sherlock shoot Magnussen? And how will the answer affect both John and Sherlock?

Sherlock is apprehensive about his Valentine's Day plans, but John doesn't think there's anything wrong with Sherlock's present.

John learns what it is to be Sherlock's mate.

Sweet fluff documenting one morning in John and Sherlock's relationship.

Sequel to Please Go. John returns to 221B and realizes several things about himself and his relationship with Sherlock.