Megumi was your boyfriend shortly after joining the crew of sorcerers, and then after you got notice Megumi actions he wasn't the affectionate type but he will show it with awkward gestures like a side hug, pat on the head, or just something gentle to show his love despite he will be stiff with it. Even for dates he won't call it a date just like grab noodles or something you like.

You guys had a big mission in a fee days so you laid off fighting curses to lay low before the big mission Satoru Gojo was yet to tell you guys so Megumi trying be affectionate he decided to spend the weeks with you

You were in his room where he shares with Yuji and he came in the room as he rolled his eyes, but he only did to show his love that's how he did it so he gently sat on the edge of the bed