(Deciding to change the pronouns to match the bodies for the smuttier part, I just find it a bit less confusing).

Some time later, when it was almost night time, Nagito slipped outside and made her way to Hajime's cottage, along with an opaque, deep red bag. Nagito knocked on the door, waiting for an answer. Hajime slowly opened the door, looking out to see Nagito. "Oh, hi, Nagito. Did you want something?" "Well...can I...come in?" Nagito replied, sounding slightly nervous. "Hm? I suppose so..." Hajime replied, sounding a bit confused. Nagito walked in, Hajime closing and locking the door behind her. Nagito stood by the bedpost as Hajime sat on the edge of the bed. "So..." Hajime started, "What is it that you wanted?" Nagito looked up at Hajime. "I...was wondering...the change in our bodies didn't change anyone's sexual preferences, right?" Hajime, looking more confused, replied: "Um...I don't think it did...". Nagito continued, "Then...you're only really interested in girls, am I correct?" "Uh...yeah..." Hajime replied. Nagito carried on, "Since our bodies are different now...um...I...w-will..." Nagito struggled to say it out loud, a deep blush coating her face. She let out a sigh and blurted out: "W-will you have sex with me?" ...silence filled the room, Hajime remaining quiet from shock. "Please answer already, I feel so embarrassed!" Nagito thought to herself. "Um..." Hajime began to answer, "Well...I don't really have a major reason not to...I-I guess I could, if you really want to..."

Nagito was met with happy surprise. "Th-thanks..." She said, as she handed the bag she brought with her, over to Hajime. "What's this for?" asked Hajime. "Well, I wasn't sure what you might be into and 2 girls tend to use toys a lot anyway." Nagito explained. Hajime rummaged through the bag, pulling out a few items that she set aside for a moment. "Come here then, Nagito." Hajime calmly requested. Nagito made her way towards the bed, then, Hajime carefully guided Nagito onto the bed and began undressing her, leaving only the black thigh-highs. "Here, wear this." Hajime handed Nagito a pair of cat ears, which Nagito obediently put on. Hajime grabs something else, but before Nagito can see what, Hajime puts Nagito over her knee. Suddenly, Nagito feels something poking at her butthole. "A-ah...w-what's th-that?"

"It's a kitty tail, a kitty tail butt plug." Hajime began pushing it inside, causing Nagito to make more noises: "A-ah! Nngh...m-mm."

"Hehe~ Now that that's in, be a good neko and nyan for me."

"Nyan? B-but-" Nagito's face blushed even deeper, but her words were cut off by Hajime.

"I. Said. Nyan. For. Me." Hajime demanded, swinging her hand down and spanking Nagito.

"Aah! S-sorry...n-nyaa~"

"Louder." Hajime demanded, spanking Nagito even harder.

"AAH! N-nyaaa~!" At this point, Nagito's face appeared almost completely covered by a deep pink blush.

Hajime then began to move the tail around, inside Nagito's behind.

"A-aah~"

"Moan louder for me~" Hajime commanded, pushing the butt plug in and out.

"A-aah! Aaaah~!"

Hajime then grabbed a few more items, and then, after taking the butt plug out and shoving in a dildo in its place. "A-aah!" Then she had Nagito sit up, pushing the dildo in more, "M-mm~!" before tying Nagito's ankles the end of the bed. She then tied Nagito's hands behind her back. And then grabbed a strap-on to wear and grabbed Nagito's thighs to lift her up a bit, before beginning to insert the strap-on in her vagina. "N-no...there's no way I can take 2 inside me at once!" Hajime ignored Nagito, continuing with a smile on her face. "A-aah! Wha-" Nagito was interrupted by Hajime rubbing Nagito's clit. "A-aah~! Mmm~! Wh-why is it so s-sensitive? Haah~!"

"You didn't know? Vaginas have 2 times the amount of nerve endings that a penis has." Hajime explained.

Finishing her statement, Hajime moved on to thrusting inside Nagito's recently gained sensitive hole. "A-aaaah~! Aaaaaah! Haaah~! N-aaah! Th-that's so good...m-more~ Please...ram it harder inside me~" Hajime acted on Nagito's pleading, shoving the strap-on even deeper and thrusting harder, more violently, gripping Nagito's thighs. The increase in movement caused the dildo in Nagito's other hole to be thrust in and out too. "A-aaaah! A-AAAH~! AAAH! HAAAAH~! MMM~ H-HAJIME! AAAAH!"

"Hey, your boobs are rather small. Makes you look so innocent, how cute~"

"H-huh? C-cute?" Nagito felt a mixture of surprise and embarrassment.

"Yeah, this new body of yours makes you even more adorable~" Hajime said lustfully, leaning in to caress the petite breasts.

"A-ah! H-Hajime, what are you-"

Before she could finish, Hajime began to pinch and twist one nipple whilst sucking on the other.

"A-aah~! Mmm~ H-hey, d-don't stop slamming into me, p-please..."

Hajime continued thrusting, whilst twisting both nipples and kissing and biting Nagito's pale neck.

"Aaaah! Aaah~ Mm~ Aaah! Haaah~!" Nagito continued to moan as the pleasures mixed together, as Hajime traced her fingers along Nagito's back, causing her to twitch and moan louder in response.

"H-haah...Hajime...I think I'm gonna...h-aaah~!" Nagito's cum trickled down her thighs, just as Hajime pulled the strap-on out. "Happy?" Hajime asked, still smiling.

"Y-yes~ Really..." Nagito replied, as Hajime removed the other dildo and untied Nagito.