Post S3 Obey Me, where MC doesn't have a job after the brothers leave and go back to the Devildom so they start working at The Angel's Halo.
While Luke is around as well, he usually spends equal time in the Celestial Realm training. Though as far as he's concerned, he's still on a mission in the human world with Simeon, but because he's a young unranked angel he needs to go back to the Celestial Realm to train, unlike Simeon
MC helps Simeon set up everything to open up in the mornings.
Solomon drops by before the café opens and the three of them usually have a small breakfast together.
Solomon & MC then head out to train and after a few hours MC comes back for their shift at the café.
Since Simeon has just been turned human and only Solomon, Barbatos, Diavolo & Lucifer know, Lucifer wants to keep an eye on him/check on his progress but knows Simeon will give him "a look" if he kept stopping by. So, every once in a while, he sends one of his brothers over so they can "spend a weekend with MC," and when they come back, he asks how Simeon is doing as well. And since Lucifer has known Simeon the longest and has always cared about and worried over him none of them question this (except for Mammon who, in S4 we learn, has been suspicious about Simeon's presence in the human world since S3)
Anyway, it's summer. It's breakfast at the café on a Friday morning, and both Simeon and MC are in loose, light clothes. Solomon, when he turns up, is in his usual black turtle neck.
Simeon & MC both immediately assure him that he doesn't always have to cover up. That they're all friends here and they have been so for years and in such oppressive heat he could opt for something less likely to boil him alive
He smiles sweetly and thanks them and says he'll consider it for next time
On Monday, things are back to normal as usual. MC & Simeon are at the round table in the break room. Solomon walks in, heading towards the coffee pot, in a short sleeved crew neck t-shirt, whistling happily to himself, and Simeon & MC are just sitting there looking at him like
Solomon: Good Morning☺️
Simeon: ...
MC: DID YOU GET MAULED BY A BEAR?!
((the weekend was Asmo's turn for a visit, and consequently, Solomon's neck now looks like someone tried to gnaw a chunk out of it))