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“Hey Deku,” Katsuki says, grabbing Izuku’s arm before he could walk into his homeroom. “Don't forget I'm gonna be out on a training trip for part of the day. I don't need your dumbass freaking out on me when you forget.” Trying to defend himself, Izuku says, “Hey!! I'd be fine!” Only to give up after receiving a glare from Katsuki. “Yeah... Thanks Kacchan.” Rolling his eyes, Katsuki says, “Whatever Deku, see you later today.” Before walking away to his own first class.
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Other than Katsuki being on a hero course trip, it was a fairly normal day for 1-C student Izuku Midorya. All of his classes through the morning have run smoothly bringing him now to his history class. As it was nearing the end of class most students were whispering amongst themselves or working on their assigned work from their earlier classes. All in all, a normal class for the general education first years.
Although that normalcy is quickly thrown for a loop when the school alarms begin to go off. The sudden noise causing Izuku to jump and quickly cover his ears. Catching the concerned gaze of Nozumi Izuku quickly fumbles through her vest to get his ear plugs. Most other students thought the alarm was some sort of practice, and subsequently looked to their teacher for guidance in the situation, but seeing the puzzled look on Midnight's face, that calm quickly faded.
Not long into the blaring it stops prompting Izuku to remove his earplugs. From the intercom then came the oddly calm voice of the school principal, Nezu. “All Pro hero faculty please report to the USJ immediately. Students please go into a temporary lockdown.” Hearing the announcement their history teacher, Midnight, quickly jumps into immediate action. “No one enters or leaves the room and keep the lights off until Nezu says otherwise!” Midnight yells out in a deadly serious voice before turning off the lights and running out of the classroom leaving many confused and terrified students.
As the door slams shut behind her, for a few moments, the room is left in complete silence. It was quickly broken by the hushed voices of concerned students. Enough to break the silence, but not loud enough to be deciphered. Eyes darting around the room, Izuku is left with a growing panic in his gut. Despite this, on the outside the only indications of his panic is the shake of his leg and the ever quickening rise of his chest.
Izuku’s dangerous inner spiral was broken upon feeling Nozumi’s paw lightly hit his leg, looking down at his shaking hands Izuku let out a choked sob. Jumping up out of his desk Izuku attempts to bolt towards the door, although he doesn't get too far as he is stopped by the pull of Nozumi’s leash and a pair of arms wrapping around his midsection.
Not registering what was going on around him, Izuku lets out another sob grabbing at Hitoshi’s arms pulling away until his legs give out underneath him. Hitoshi, who had a hold of the panicking teen slowly lowers Izuku down to the ground as a few classmates around him help to move desks to allow space. As soon as Izuku is on the ground Nozumi is on top of him, licking his face. Shinso continues to sit with Izuku, one hand still around his waist and the other brushing through his hair.
“I-I want K-Kacchan!” Izuku whispers out just loud enough for Hitoshi to hear. Overwhelmed he brings his shaking hands to his face, hitting the sides of his head with the heels of his palms. Before Shinsou could even think of doing anything, Nozumi was already pushing herself between Izuku's head and hands, her cold nose making Izuku pull away, bringing himself closer to Hitoshi.
“Izu… It’s fine, Sparky‘ll be okay.” Hitoshi says, pulling his fingers through tangled green hair. “There's no way he’ll let anything bad happen, he's far too stubborn for that.” Hearing Hitoshi’s statement Izuku lets out a minute giggle thinking of the many times Katsuki would threaten basically anything, not willing to go down no matter what he was up against.
“Hey, there you are.” Hitoshi says hearing Izuku’s giggle, definitely not letting his lip curl in the smallest of smiles. Noticing Izuku’s breathing beginning to steady, Hitoshi drops his arms. Although upon moving them to rest next to himself, Izuku clings onto him in an attempt to disallow the movement. Letting out a soft chuckle, Hitoshi allows the smaller teen to manipulate his arms into their previous position.
After about an hour Izuku is startled awake by the intercom, “Students lockdown is dropped and you are dismissed. Be safe going home.” Nezu says, again in his scarily cheery voice. Letting out a yawn, Izuku fully wakes up hitting Hitoshi in the face while stretching. “Wa?” Hitoshi says waking up himself. “We uh… can leave I guess?” Izuku responds, checking the time on his phone, he then finds a text from a few minutes ago.
Meet me in the locker room nerd
“Kacchan?” Izuku says, jumping up, startling a confused Hitoshi. "Sorry, but uhhh… K-Kacchan." Izuku then mumbles out while motioning to his phone. letting out an exasperated sigh and a laugh, Hitoshi nods saying, "Go see him, I'll see you later."
Finally getting out of the classroom, Izuku runs as fast as Nozumi will let him. He ignores the displeased grumbles of students and teachers as he knocks into them. Finally making it to the locker room he bursts through the door with a sob. He runs directly into Katsuki’s arms, him having been standing by the door waiting for this exact moment.
“Hey hey Izu, I’m okay. I am here.” Katsuki says in a whisper trying to calm him, he succeeds, falling into a giggling fit with Izuku from his last phrase. The moment is broken by the snap of a phone camera. Katsuki instantly zeros in on the perpetrator saying “What the actual hell! Delete it!”. Kirishima's eyes are wide, though he can't help but laugh under his breath as Katsuki makes his way over with a growl. I mean who wouldn't when you see the exhausted Izuku clinging onto his neck with the fluffy Nozumi diligently following behind.