Quite a number of heads turned sharply, a double-take between the unexpected interaction between the two.

A malicious expression flickered on Shiro's face before setting into a poised expression of wonder.

"Long time no see, huh?" Shiro said tentatively.

Gray's expression instantly closed off, hardening, as his lips turned downwards. Displeased.

"What the fuck are you doing in here?" Gray said in a low, threatening, voice.

The question seemed to amuse the other because a large smile spread into his lips, nearly an all-out grin.

"Well, see, I was looking for you…" He said candidly. "And somehow ended up crossing paths with your friends here and-"

His tirade was interrupted by Gray who swiftly punched him in the face, throwing him into some of the guildmates who were watching the scene, behind Shiro.

A stunned silence followed.

Gray glared at Shiro, who in turn smirked at him, a calculating look in his eyes – even if they were being covered by his hair.

"Feeling vivacious, are we?" Shiro muttered, just loud enough that only a few people hear him – one of them being Gray.

"You asshole!" The ice mage snarled as he all but threw himself at his brother, intent in landing a few more punches on the other.

But then, Gray was caught, held back from hitting his brother.

Chaos spread out, with some people holding Gray down while a few others were seemingly helping and comforting the twin brother while the rest of the guild just assisted to the messy spectacle.

"Enough!" A booming voice instantly killed the noise that had risen, everyone turning towards the diminutive figure of the Master. The Master was frowning deeply but, he let out a sigh, shook his head at himself and started speaking. "I don't know if you forgot but we're celebrating the birthday of one of our dear guildmembers. I won't let an unnecessary row to disrupt the festivities." His words had the intended effect as he saw the subtle flinching of the intended people. "Now, let's go back to our celebration!"

After those words, the heavy atmosphere that had been permeating the whole guild lifted, and music, food and laughter filled the guild once again, the overall merriment back to high levels.

Makarov walked to where the epicentre of the situation had been, seeing as Gray, his twin, Natsu and a few others still were.

"And we…" he looked at the twins sharply, "I think we need to have a serious conversation."

And with that, Makarov turned on his heel and headed to his office.

Gray and Shiro followed, silently.