■ - Bedroom/house/living quarters headcanon
Being the commander, Erwin has surprisingly small quarters at the Survey Corps base. Levi used to have is own quarters but they aren’t bothering hiding their relationship anymore so Levi gave them up and now lives with Erwin. Their quarters consists of a living area, a bedroom a bathroom and a storageroom. It’s very practical and the only decorations are Erwins large book collection.
∇ -. old age/aging headcanon
When the titans are defeated Levi is gonna start his teashop and Erwin helps out. At first the role reversal is a something they both need to get used to (Erwin has difficulty not controlling anything that happens and Levi finds it hard to give Erwin ‘commands’ and being his boss)