“A-ah... I wasn’t paying very much attention to my... physical condition, it seems...”

Winter where you and Elias live is pretty harsh, so its not like there’s any reason to not be inside all the time; its not like the either of you have need to go out save for groceries! Which you usually handle anyway, as the magus is usually squirreled away in his study

The result is Elias putting on a lot of winter weight and him being slightly embarrassed about it.

(Character from the Ancient Magus Bride, and the art belongs to Booneyard on Bluesky! Their art makes me feral oh my god)