You don't understand what Gilgamesh is thinking, he drank quite a large amount of the elixir of youth which made him turn into a teenager, When this happened you were fast asleep in your room after spending a lot of time on the previous mission. After a few hours you woke up and you were surprised to see Gilgamesh next to you looking at you while smiling smugly.

"Looks like you're sleeping really well, master" Gilgamesh said in a teasing and mocking tone.