I am so, so sorry! A lot happened, I got busy. So I at least tried to stretch this a bit longer.
     Yes, it is established that Scara and Gorou spend a heat together. This is staying SFW, so no naughty business between the brothers. Scaramouche, in my headcannons, has never really explored sexual preference or himself. Gorou, however, has had really severe heats in the past, so he takes medication to mute some of the symptoms. Because of such, he generally just takes his heats as a week to nap and unwind.
      There is no end note, the bold at the end is texting between Beidou and Kazuha.
              Scaramouche was miserable. Despite the help of Chongyun and Albedo, his heat was only delayed by a few days. Although, as it'd turn out Gorou's cycle was due that week as well, and seeing as they were both omegas, Gorou invited his brother to ride out the cycle with him. It most certainly wasn't the same as an alpha, like Chongyun letting Xingqiu help, but omegas helping each other could cut the cycle length too.  sitting at his desk with a camping stove, boiling some water in a pot and ruffling through his drawer. "Hey, I'm making instant ramen, shrimp ok?"
           Maybe that was how he ended up in a nest on the floor in Gorou's dorm room. Gorou had grown significantly closer to Scara in the months since his diagnosis. The two had been fairly close, but drifted apart in the past five or so years. When they'd started at Teyvat High, no one knew the two were brothers, not because they didn't look alike, but because they tended to ignore each other.
            "Shrimp's fine." Scaramouche affirmed, nuzzling into a shirt of his blindly, breathing in the scent of the dark fabric before his indigo eyes widened as he shot up, choking on his own spit.
             "You ok over there, Scara?" Gorou asked, stirring the noodles with his chopsticks in the boiling water.
             Scara muffled a low growl, tossing the shirt out of the nest as he hastily began searching the others, searching for the scent of fresh breeze and maple leaves. "No, that damn alpha's scent is all over! I swear, wherever I go, he's there!""
         "What?" Gorou tilted his head, rather fitting of his dog-like nature. "Who?"
           "Mrs. Ningguang's kid, Kaedehara." Scaramouche growled.
-Three days prior-
              Kazuha lifted his laundry basket and began off towards the laundry room on campus. He'd found himself in black sweatpants and his older brother, Tomo's, hoodie. It was a comfortable red hoodie that Tomo let him borrow on his way back to school. The crimson fabric was always littered with white fur from Tama, Tomo's cat. Tama was living with Ningguang at the moment, seeing as Beidou's travelling lifestyle didn't quite fit the cat's quiet life she lived with Tomo.
        Kazuha's white hair was pulled into a quick and messy bun, seeing as the alpha had quite literally rolled out of bed not long prior. To be completely honest, he didn't actually have any clean clothes to change into. Beidou probably would have laughed and congratulated him on stretching his laundry so thin, while Ningguang would be absolutely appalled and not do his laundry only once a month. She'd also probably sit him down and make it a point that clearly outlined when he should do his laundry, preferably every two weeks, and to set aside clean clothes and an emergency change in the event he ran out of clean clothes earlier than his expected laundry day.
           Kazuha locked his dorm room door before walking to the laundry room. It was a large room on the other side of the common room, open and lined with stacked washers and dryers. Kazuha noticed it was rather quiet today, at least for a Saturday. In the back corner, a blonde omega with a long braid was transferring his laundry to the dryer on top, standing on his tip-toes and leaning on the washer just to reach the button. Kazuha understood that; he was considered short for an alpha. Further from the omega, just by the door, a tall blue-haired alpha and a brunette bunny omega smothered in her scent were beginning a load of towels and washrags.
         Kazuha stepped into the laundry room, finding himself crashing to the floor suddenly. He shook off his shock, noticing a scowling omega- there was really no way that he could possibly be a beta, right? He'd have to ask Gorou- scrambling to put his laundry back in a basket. It was clean, yes, smelling of the school's generic detergent but it also smelled of sakura blossoms, a powdery musk, and the soft nitrogenous scent of... lightning? Kazuha hurried to his knees, helping the offended student get his laundry together.
           Scaramouche stood with a huff, racing out of the room. Kazuha stood before falling back down again. Something had hit him in the hip. Had Scaramouche hit him? Kazuha shook his head and lifted his basket, dumping it into the washer and fishing through his pockets for a quarter for detergent. Upon finding one, he began his laundry and sat on the floor, messing around on his phone while he waited on his laundry to complete.
             Kazuha glanced up at the washing machine, which was beeping in a song-like tune. He hoisted himself off of the ground with a muffled groan, rubbing his back before opening the washer with a soft click. He moved his laundry to the dryer on top and fell back to the floor, continuing to play on his phone while he sat against the wall for another hour.
             "Hey, Kazuha. Kazuha, wake up." Kazuha rubbed sleep from his eyes when he saw Xiao, an unlikely friend of his from their poetry project in Ms. Miko's class in front of him, lightly shaking him. Xiao was a pretty textbook male omega. Small and petite, radiating a pleasant floral scent of Liyue's native Qingxin, even when he wasn't in heat. "Hey, I wasn't going to wake you, but your laundry finished two hours ago. I just finished my load not that long ago."
              Kazuha stood and quickly gathered his laundry, nodding in thanks to Ayaka and his classmates before leaving to his room. Upon arriving back in his room, the alpha dumped his laundry onto his bed and began folding his clothes, making a half-decent attempt at sorting his clothes while he fold them; not that it was going to matter as he always seemed to grab whatever was on top in the mornings. All of his clothes followed the same color palette, so it wasn't too disastrous to grab two random items and hope that they matched.
              He neared the bottom of his load when he came across a soft, semi-worn out sweater. It was black and emmitted the soft scent of powdery musk, the gentle perfume of sakura trees, and the refreshing scent of nitrate, like the scent of the outside air just after a thunderstorm. It had to be Scaramouche's sweater, Kazuha realized. Well, it was Saturday evening. He could catch Scaramouche before bed, couldn't he?
             Kazuha once again pulled on his sandals and locked his dorm behind him, holding onto the sweater with one arm and shutting the door with his other. He made his way to the common room, quickly scanning the directory for Scaramouche's dorm number. Upon seeing the number, he made his way to the door and knocked.

No answer.

          He continued waiting before he turned to leave. He could always return Scaramouche's sweater on Monday, right? They had math together. He could just return the sweater then. He began back to his room, pausing to check his phone after feeling the vibration on his thigh. He lifted his phone to see a text from his mother obscuring his background, a picture of him and his older brother on the first day of school. They were at Tomo's apartment, since Tomo agreed to take Kazuha to school since Ningguang was going in early and Beidou had work... not that Kazuha needed to be dropped off in a police cruiser again.
Mom: Your mother and I are going to visit your brother, do you want me to pick you up from school?
Me: Yeah, I'll meet you downstairs.