Time skip~~!!! About 10 months maybe?
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"We're home!!" Erina shouted, embracing Miyuki in a flying hug, "Mama! I missed you~! It's different seeing you compared to calling~!"
Catching Erina into her embrace, Miyuki gushed, "Erina~~!!! It's lovely to see you again~! I missed you too!!"
Getting smushed into Miyuki's breasts once again, Erina began struggling while thinking, 'ah... dammit, I forgot about this part in mama's hugs...'
"Oh! Sorryyyyyyyy Erinaaaaa!!! I didn't mean to!!!" Miyuki cried, releasing a breathless Erina back onto the floor, "Your sister Suzuki is arriving in a little bit so do yo-"
"I wanna organize her room~!!" Erina exclaimed, leaping back to her feet, "It's always fun organizing Suzuki's room!!"
Organizing Suzuki's room, Erina muttered, "So what are these magazines...? Why would she be hiding this pile of magazines under her bed behind a bunch of stuff..."
Picking up a magazine from the top of the pile, Erina began reading, murmuring, "What are these...tags? Genres? Kinda weird... "
Meanwhile, downstairs...
"Hello, Mrs. Noragi..." Yuiko muttered, a little hesitant seeing how many stars were filling Miyuki's eyes, "Is... everything okay? Where is Erina...?"
Running up to Yuiko and planting her hands onto Yuiko's shoulders, Miyuki whispered, "Is it true?! That you and Eri~ are dating~?"
"U-um..." Stuttered Yuiko, trying to back up from the aggressive Miyuki, "U-um... y-yeah...? Why..."
Letting go of Yuiko, Miyuki danced around the room exclaiming, "I knew it~!! Today's a joyous occasion~!! Confirmation that the innocent Erina has a girlfriend~!! I never thought I'd see a day where she would be dating someone~!!"
"Hahh...." Yuiko muttered, watching the mother of two dance around like she was in high school again, "Well... um... So where's Erina?"
"Oh~! I forgot~!" Miyuki exclaimed, "Hehe... you wanna go see your girlfriend don't you~!! Well, she's organizing Suzuki's room right now~!"
"She's organizing...?" Yuiko asked, "Why does she like organizing so much anyway..."
Chuckling as she pushed Yuiko up the stairs, Miyuki answered, "Only the heavens would know why that girl likes organizing so much... Now shoo~! Go hang out with your beloved~!"
"Okay..." Yuiko replied, walking up the stairs towards Suzuki's room, "Hm... I haven't been here for a while... where's Suzuki's room again?"
Walking towards an ajar door, Yuiko murmured, "Yeah it's this one... so what's Erina doing...Ah... she found the p*rn collection Suzuki bragged about way back..."
"Hehe... you know what..." Yuiko whispered, "Since she hasn't noticed me... and doesn't know I'm coming today... I want to see how Erina reacts to those magazines..."
Sitting on the ground, Erina began flipping through the magazine, whispering, "Whaaaa.... this is so... s-s-scandalous! Bondage... BDSM..."
Flushing deeper and deeper as she kept reading, Erina muttered, "W-w-what is t-this stuff... p-pet play? S-slave play? W-what a-are these t-things..."
"Damn... Erina picked up a kinky one didn't she..." Yuiko giggled as she watched Erina mutter to herself while blushing, "Hehe, well... hehe... this fun to watch..."
Continuing to flip through the pages, Erina mumbled, "P-people a-are into t-this stuff?! L-like... d-denial... h-h-humiliation... c-c-c-chastity b-belts?! W-whaa..... d-dirty t-talk? W-wha... w-w-what a-are these g-genres... w-why are t-they w-w-written here..."
Snapping the magazine shut, Erina moved to put it back on top of the pile when she noticed a gaze staring at her from the door.
"Who are you~! S-show yourself!" Erina exclaimed, trying to suppress the fear in her voice.
Opening the door, Yuiko walked into the room with a teasing smile plaguing her face, "So~? Did you have fun reading~?"
"I-i w-wasn't r-reading!!" Erina denied, trying to use her body to shield the pile of p*rn magazines from Yuiko, "D-don't accuse me of r-reading p*rn magazines!!"
Chuckling, Yuiko teased, "I don't know what you're talking about~? I only asked if you were reading~! Hm~, so you were reading p*rn magazines, eh?"
"N-no I wasn't!" Erina retorted, "W-well... m-maybe..."
"Hmm~~?" Yuiko asked, "Did you like it~?"
"N-no! It was my first time reading!!" Erina exclaimed, "I just found them under Suzuki's bed!"
Pulling Erina into a hug, Yuiko whispered, "Oh I know... I was just teasing you~"
Returning Yuiko's hug, Erina was outraged at Yuiko's words, replying, "I knew I shouldn't have trusted you bakako!!"
Giggling, Yuiko asked, "So, you want me to help you with organizing? Then we hang out in the garden out back if you want~ I know how much you like the garden gazebo and all~"
"En~!" Erina replied, pointing towards various areas to assign jobs for Yuiko to complete, "Maybe we can even go out! I don't have anything planned tomorrow! So we could go downtown!"
Helping Erina finish her organizing, Yuiko asked, "So wanna chill in the garden and chat? Suzuki should be showing up soon!"
"Yeah!" Erina agreed, holding the door open for Yuiko, "We can tell her about what happened at the training program thingy!"
Giggling, Yuiko pondered, "You think Shousuke is gonna show up? They are dating now I think..."
"Are they? I don't know..." Erina replied, leaving the house, "I'm not too familiar with those types of things..."
Entering the garden area, Erina continued, "Like... I know we're 'dating' but like... what does that mean? What are we supposed to do?"
"Well... I have a decent idea of what we do once we get older..." answered Yuiko, lacing her fingers with Erina's, "But for now, just think of it like we're best friends, but a level higher~"
Nodding, Erina asked, "How do you know these things, Yuiko? When it comes to dating, you always know so much more than me..."
Staggering for a second, Yuiko answered, "Well... I'd say my knowledge is maybe... a little more than average... it's just that I'm not super innocent and sheltered... or live under a massive rock..."
"Whaaa....?!?! I don't live under a rock!" Erina exclaimed with mock indignation, "I feel falsely accused~! Hehe... no, I see where you're coming from..."
Laughing, Yuiko took a seat at the gazebo while asking, "Isn't that Suzuki right there? Running towards us?"
Spinning around in her seat, Erina replied, "Is it Suzu-"
"ERINAAAAAAAAA" Suzuki shouted while enveloping Erina in a flying hug, "I've missed you so much~!"
Keeping Erina in a suffocating hug, Suzuki leaned towards Yuiko whispering, "So you're dating now~~! I knew it would happen soon~!"
Smiling, Yuiko teased, "Well~ I heard you started dating Shousuke~!"
"Yeah... we did start dating..." Suzuki answered, a slight blush tinting her face, "Well! I wanna hear about you two's life at the school!"