It was late into the night for the citizens of the Mushroom Kingdom everyone was sound asleep in their beds. Princess Peach however was wide awake as she scanned through some ancient documents from her family history that were hidden within the archives of the castles library.
Peach sighed rubbing her temples in frustration before hearing her bedroom door open slowly revealing her guardian Toadsworth.
"My dear why are you up so late?" He asked giving the papers in her hands a casual glance.
"Um it's nothing Toadsworth just wanted to look into something that was bugging me for some time?" She laughed softly before yawning.
"Well maybe we can look into later after you get some proper rest?" Toadsworth smiled gently.
"Alright goodnight"
After the elder toad left Peach was sure to lock the door tightly.
"Alright let's figure this out…"
It was into the next morning Peach fell asleep with her arms on the desk and the papers scattered all around.
A sudden knock on the door alerted the Princess to jolt awake with a squeal of shock.
"Princess is everything alright the door is locked…" Peach sighed rubbing her head.
"Sorry it's a habit you know…" She heard the familiar hum of acknowledgement from the elder toad.
"Of course Princess, but that is not why I am here there seems to be a great disturbance"
Peach's eyes widened in alarm already getting dressed for the day," What is the problem have you contacted Mario and his brother?"
Toadsworth grew silent for a moment before her spoke another word.
"Ah..that's the problem Princess it was Master Mario who called his little brother Luigi fell ill with a very high fever this early morning" Toadsworth face looked grim for the younger Mario brother's condition.
Peach's eyes widened in shock before reaching for her papers," Um tell Mario I'll be there momentarily"
"I understand Princess.."
After reaching the Mushroom Kingdom Hospital there she spotted the hero himself sound asleep.
Peach cleared her throat softly," Mario it's me…" Mario jolted awake turning his head to Peach his blue eyes wide.
"Princess oh thank goodness" He sighed looking rather upset.
"How long has Luigi been here?" Peach asked taking her seat next to the elder brother who grimaced.
"The staff took him into the emergency hoping to contain his fever they said it's not as bad as it was, but they are worried about how it got like that out of the blue…" Mario sighing with shaky breath.
Peach smiled softly before showing Mario her findings," Mario there might be a reason for all of this?"
"Oh really?" Mario glanced up to his best friend his eyes full of hope.
"Yes in fact I was up pretty much all night looking into my family roots that tie back ten of thousands of years ago" Mario felt his throat clench.
Peach smiled," I even took a glance into your history" Mario frowned slightly.
"What does that have to do with Luigi…"
Peach chuckled," Simple have you heard of the omegas?"
"Excuse me?"
To put it simply those fevers that Luigi is going through is simply him going through a phase of sorts"
"A phase is that it?"
"That depends of how you look at it Mario" The Princess sighed rubbing her head gently.
"What aren't you telling me Peach is Luigi going to be alright or not?"
"Yes, but we shouldn't talk here come to my castle in a few hours and we can discuss more"
"B-But what's so bad about not speaking about it here?" Mario asked.
"Its supposed to be a hidden secret I'm really not supposed to be telling you any of this, but all more I can say is Luigi will be fine he's not in danger at the moment"
"Wait at the moment what does that mean Peach?" Mario's eyes narrowed in concern for his brothers safety.
Before he could get any more answers the nurse had called for his presence. Mario sighed shaking his head before stalking off to his little brothers room.
Peach smiled softly before she followed behind Mario to see Luigi.
A/N: Yes you heard right girls and boys this is going to be a Omega and Alpha AU with Luigi as Uke. For all those who wanted Mario as the submissive I'm sorry I won't ever write Mario as some bottom. This has Waluigi, Bowser, Wario, King Boo, Mr. L, Dimentio and Mario with our darling cutie so if anything like this upsets you please be respectful and hit the back button. This is my first Yaoi story for Mario so if you have any 'Great' Criticism that would be helpful for my future writing then by all means go for it. But people please don't flame and say 'eww yaoi so gross why won't you write Hetero or die' Trust me I've heard better out of a five year old and that five year old threatened me with a gun. So thank you and have a nice day my lovely viewers.