Since being dumped in the past, you'd had your struggles. The boys you knew and loved had no idea who you were. Sure, they liked you - they'd liked you in the past, too. But they didn't share the same memories. Not even close. Some had managed to repeat - being chased by a giant snake being one of them.
But... others didn't.
Mammon had no idea that you had loved him in the future. He looked the same as he always had, of course.. he spoke much the same. But it was like being with a stranger. Mammon was much more confident in the past. He'd yet to endure any real ridicule day in and day out from his brothers.
You could still see that glint in his eye when you praised him, but it wasn't quite the same. It wasn't quite Mammon. And that made it feel a little more lonely.
Mammon, of course, wasn't aware of this. He liked you and was forward about the fact that he did. He'd casually give you some Grimm every now and then just to make you smile. He was surprised when you came back from a trip out with Asmodeus and crawled into his bed. You smelled of booze.
"What the hell are you doin'?" He muttered, rolling over. His D.D.D was the only light in the room.