What if?

Osamu?!

 2 hours later

Kageyama and Ushijima had an urgent meeting so they left, s/n wanted to get some onigiri so y/n was looking for it then she came across miya onigiri. She knew that Osamu was probably working there so she tried to ignore it but s/n had already gone to the store. 

"HII ARE YOU MIYA OSAMU!! YOUR MOM'S HIGH SCHOOL FRIEND!! WOW, MOMMY KNOWS A LOT OF FAMOUS PEOPLE!!" S/n said jumping. 

"Omg s/n." Y/n said angrily approaching s/n. 

"S/n stop it please, its..we're supposed to be celebrating my birthday right now. Darling..please stop you're not helping at all today, I thought you were going to be a good boy today m?" Y/n said putting both of her hands on her hips.

 "Gomen" s/n said looking down.

 "S/n stop saying that unless your not going to repeat the same thing." Y/n scolded.

 S/n pouted, "Hm I won't do it again, darling is sorry. Please mommy forgive me?" He said with pleading eyes. 

Then y/n sighed and nodded, "Okay my dear s/n, if you do it again then we're going home." Y/n said.

 Osamu was just looking at the two going back-and-forth. 

"Y/n and s/n..? You're here to get some onigiri?" He asked. 

"O-Oh hehe yeah darling wanted some so I was just looking for a store. But I can't believe it Samu you actually started this business not that I'm complaining." Y/n said giggling.

 "Whoop I love food and I love making onigiri so I'm actually quite proud of myself." He said.

 "So little guy, which flavor do you want?" Osamu said looking at s/n. 

"Can I have Mentaiko onigiri?" He asked.

 "Darn ya want it very spicy or just a bit?" Osamu asked. 

S/n said he wanted it a little bit spicy. 

"Haha, yer just like tsumu he can't stand a lot of spice." Osamu said and started to take out recipes.

 "Mommy, can I use your phone just for a bit, please?" S/n said and y/n gave him her phone. He happily took it and started playing games.

 "So yer married?" Osamu asked while continuing to work. 

"Pfft married, I can't even find a decent man to date" Y/n answered.

 "So yer saying that..were you harassed or did something happened to ya?" Osamu asked, looking up. 

"No.." Y/n answered quietly. 

"Did you break up with Sumu because you..did you cheat?" Osamu said pausing and looking up at her. 

"NO! I mean No of course not, I could never think of doing it in a million years. S/n is actually um Atsumu's." Y/n said.

 Osamu froze and his eyes widened, "wait yer saying that he's my nephew?" Osamu said in shock.

 Y/n nodded and looked away. "Why would you leave him then?" Osamu asked with sad eyes.

 "I thought he wouldn't want to have a kid yet, he had a whole career ahead of him, why would he want to start a family." She said looking down.

 "Ya know tsumu may be an idiot but yer a bigger idiot, Sumu was going to propose to you on the day of graduation." Osamu said and y/n's eyes widened. 

So did s/n's, he had been listening to them talking about this and he knew something was up.

"What..wait let me prosses this he wanted to marry me right after high school ended?" Y/n asked and Osamu nodded.

 "So I- I made a mistake but *sighs* it's my lost anyway." Y/n said with a sad tone. 

"What lost are ya talking about?" Atsumu said coming out of nowhere. 

Then y/n panicked. "Gahh is it done yet, onigiri uncle?" S/n said coming out of nowhere. 

Osamu's eyes widened and his heart was melting because his nephew called him uncle for the first time.

 "yes, just a minute little guy." Osamu said and continued his work. 

"Oh Hi!! It's the scary but cool setter." S/n said cheering. 

"Again with the nicknames, darling!" y/n said. 

"Haha I don't mind it n/n oh I mean y/n." Atsumu said.

 'N/n' He used to call her that nickname and sometimes tease her. She pretended like she didn't like it but the truth was she loved that nickname. 

"Here's your onigiri little guy." Osamu said breaking the silence. 

"Woah! Thank you, onigiri uncle!" S/n said happily grabbing the bag.

 "Thanks, Osamu I'll be going now," Y/n said waving at him.

 Again as y/n's figure faded Atsumu's heart throbbed, he thought Do I seriously have a chance with her, ha she has a son what are you thinking Atsumu. He sighed. 

"She's not married," Osamu said cleaning his hands.

 Atsumu's eyes widened

 "WTF SAMU!" Atsumu he yelled. 

Did he just read my mind? Wtf!' Atsumu thought weirdly looking at his twin. 

"Don't look at me like that," Osamu said. 

So she's not married but why does she have a child? Was she forced or..No? Is she divorced? maybe she adopted him? Ah, I hope I bump into her again. He thought. soon...