The Diapered Knight and the Fiery Kitten - (Private with Princess Natsumi)

[Diapered Avenger]

Erza Scarlet was walking over to her friend Mirajane Strauss' apartment. Mirajane had told her that she had an interesting idea for a game that they could play, and possibly make a wager on, which only intrigued her. She knocked on the front door, and Mirajane let her in. "Hey Mira. I'm here for the challenge." Erza said.

.....

Carla let out a brief sigh as she saw Wendy off as she left to do a job on her own. It felt like Wendy was growing up and didn't really need her anymore. There were times where she missed the days where she got to raise Wendy like her own kitten. Carla didn't even notice Natsu approaching her because of how lost in thought she was.

[Princess Natsumi]

Mirajane strauss or Mira for short was known as the Demon in Fairy Tail guild because of her power called Satan soul in which she can transform into a variety of demon's at will. She is also known as Erza's rival as they always compete over something in all it was just another day in Magnolia.

The woman giggled as she put a package on the living room table and covered it with a blanket. "This is the best and a bit embarrassing idea I have ever had" she was actually jumping from excitement. "Soon I'll be able to live my fantasy" she whispered and smiled hearing the door knock and went to answer it. "Oh you came Erza please come in"
Mira closed the door behind them.

"Ok you want to know the game I came up with right? Well" Mira pointed to the mysterious item on the table. "Go look"

.......

Natsu dragneel known as the salamander in the Fairy Tail guild and as a dragon slayer has been watching Carla for a while now and noticed every time Wendy went on a solo mission she would be upset which the boy didn't like at all. So he wanted to try to cheer up his friend. "Hey Carla? What's the matter? And please don't say nothing that would be a lie"

[Diapered Avenger]

Erza walked over to the table and pulled off the cover, revealing a package of diapers that looked like they would fit both her and Mirajane. "What the..." Erza was naturally confused by what she saw.

"Mira, what exactly is this?" She asked, wanting some kind of explanation for this.

.....

Carla was going to lie and say she was fine, but stopped when Natsu made it clear he wouldn't that slide. "Well, Natsu, I... You know Wendy's been growing up, and it's given me some mixed emotions. While I'm happy she's becoming more independent, part of me misses taking care of her like she was my daughter."

[Princess Natsumi]

Mira couldn't help but chuckle at Erza's confused expression. "Isn't obvious tomato head they are Adult Diapers for people with medical needs anyway I was thinking of ideas on how to break our tie in our competitive games and this is what I thought of you and I are going to wear a diaper for a whole day and who ever uses their diaper first loses and becomes the winners baby for a whole month"

She grinned darkly as part of her Satan soul came out. "If you don't agree to this game it means your a chicken and I'll be the strongest women in the guild"

......

"I see and you haven't told Wendy how you felt well... she is young and has to grow up on her own Carla you can't hold her hand forever" Natsu took a few steps back nervously as Carla had tears forming in her eyes. "Oh no please don't cry c..can I be honest with you...to tell you the truth I've always been jealous of yours and and Wendy's relationship because in my opinion she got to experience a mother's love"

Natsu's eyes widened as an idea popped in his head. "Hey Carla I may not be a girl but will you give me mother's love?"

[Diapered Avenger]

Erza was still confused by what Mirajane had planned. "Wait, when you mean baby, do you mean like the loser will be taken care of and treated like a baby?" She asked.

Either way, Erza wasn't one to turn down a challenge. "I guess it'd be fun to baby you." She said with a smirk.

.....

Carla couldn't help but cry until she was consoled by Natsu. She was shocked by his question. "You... you really want to try that?" She asked, unsure of how to respond.

[Princess Natsumi]

Mira nodded. "Yes the loser will be treated will be taken care of and treated like an actual baby for a whole month" she then blushed at the thought of being babied and shook her head. You will be the one being babied tin can" she opened the pink package and grabbed one which had a strawberry design on it. "Once the Diapers are on us we can't take them off if we wanted to as the Diaper won't come off until used"

She started to take off her skirt followed by her panties and opened the Diaper between her legs and tapped in nice and secure. Mira turned around and headed to the kitchen and came back with to large water bottles "we are drinking these"

......

"It's going to be embarrassing for me for a while I'll admit Natsu admitted. "But I really want to try this as I never had a mother only a father I want to know will things be different if I had a mother" the boy grinned "plus this will give me a opportunity to wear diapers as I am jealous of real baby's they get to go to the bathroom anytime anywhere"

[Diapered Avenger]

"I guess that sounds like a fair challenge." Erza said as she was handed a diaper by Mirajane. "I think you'll make for an interesting baby." She added with a smirk.

After simply requipping the diaper, Erza took a bottle of water. "So we have to wait and hold it?"

.....

Carla couldn't help but hug Natsu, happy he was actually open to something like this.