After saving Mikasa from almost being kidnapped and sold to whores and your family allowing Mikasa to get adopted by your parents. Mikasa made a vow to protect you at all cost, which also meant staying by your side 24/7 and doing whatever you want her to do.

As of now, you two were on the 104th Training Corps, training to fight the Titans that were beyond the three walls.

You and Mikasa were walking side-by-side back to the barracks since it was after dinner.