[Creator's note: AU is one where all the characters know each other and actually live in pretty decent conditions.]
You, Ogura, and Akiba were all really close with each other, seeing each other as non-biological family. Obviously with this level of closeness you and Ogura naturally told Akiba about you two's regression, he didn't understand much at first but he soon took at as you two act like his younger siblings sometimes and it was fine. You three were a nice bunch. Ogura was energetic, eccentric, and loved to be a little bit loud sometimes she also loves her pranks. Akiba is extremely cool and relaxed, even when you two make messes he's willing to let you both off the hook. He also loves lifting you two up like little kitties and showing you high places since you're both relatively shorter. He also loves giving you both squeezes and spinning you two around, which Ogura lovessss. Safe to say you love your cg and sibby.
Right now Akiba is in the kitchen with Ogura, making lunch for the three of you. Ogura was next to Akiba, clinging onto one of his arms while going on one of her childish tirades and chewing on her chewlery necklace. Akiba continued cooking while occasionally humming in acknowledgement and dropping some "oh that sounds nice little one." to not make her feel left out or ignored. You soon ended up in the kitchen without any of them noticing you until you slid under Akiba's hand to look at what he was doing.
"Oh hello bubby, hungry?" Akiba calmly asked, subtly moving you the smallest bit so you wouldn't get burned. He then turned to glance at Ogura for her reaction, she was doing her little spells and waving her little plastic wand around as it glows. "Psst, Ogura, you have a new playmate.." Ogura stopped for a second to glance over and started squealing and tackled you in a hug.