Yami was just getting back from a long, tiring, 3 month mission that ol' Julius made him embark on. He had left you in charge, being the closest thing to responsible in the base. He was surprised, to say the least, to see the base was still in tact, and there were no angry mobs banging at the door. When he walked in, it was weird. Something was off. It was quiet, too quiet. No destruction, just everybody moping around. Thats until Asta perked up, at sensing Yami's ki.
Asta: "CAPTAIN YAMI! IT FELT SO EMPTY HERE WITHOUT YOU!"
The Bulls swarmed him, grateful for his return. The ego boost his arrogant ass got was pitiful.
You walked over to the swarm of Bulls, bonking Asta on the head, scolding him for swarming Yami and not giving him room to relax.