Wonderful precure the novel: Nyammy's Darkness

I'm not hurt when you're here.

Mayu was playing outside with Iroha, Satoru, and Komugi. The four laughed and smiled at each other. Mayu's face fell as she watched Komugi play with Iroha.
"Are you sure that Yuki is fine?" Asked Mayu with sad eyes.
"It's probably a bad stomachache." Mentioned Satoru. He knew a lot about the sickness of a animal. Iroha continued to smile at Satoru, which made him stutter and blush.
"Um... Yeah,... Miss Inukai, Iroha..." Said Satoru.
"Wow!" Said Mayu. "Someone's got a crush!"
Mayu did find Satoru's attempts to Impress Iroha very endearing, but she couldn't think about anything else other than Yuki's sickness. She imagined her sick face. Iroha walked over to Mayu and took her hand.
"Yuki will be fine, I promise." She said.
"You care because Yuki is important to you." She continued. She hugged Mayu. Meanwhile, Suna pulled the covers on the sick Yuki. She kissed her cheeks and sat on the bed.
"Are you okay baby?" She said.
Yuki moaned sadly as her stomach gurgled. She open her eyes at last.
"My tummy...." Said Yuki. Yuki tried to slowly get up from the bed, but Suna stopped her from doing so. She petted Yuki and smiled.
"Now, Yuki, You're sick". Said Suna.
"But I need to protect Mayu." Argued Yuki.
"Now, how are you going to do that if you're sick?" Said Suna.
"Now rest little Yuki." She said.
Mayu went back to the house to visit Yuki and Suna. She was worried sick for Yuki. She looked at Yuki and stared back at Suna.
"Auntie, is she going to be okay?" Asked Mayu.
"Yes, sweetie. Don't worry." Said Suna.
"I love you and Yuki so much." Said Suna.  She hugged Mayu tightly.
"Um, Mayu, what's so important to Yuki that she wants to leave?" Said Suna.
"Well, can you keep a secret?" Said Mayu. Suna nodded her head.
"Well, we're a bunch of super heroines who fight and try to purify animals who've gone bad!" Explained  Mayu.
Suna smiled. She now understood Yuki's feelings.
"Sounds like a big deal." She responded calmly.
Mayu was shocked. She didn't expect her aunt to take the information so well.
"Auntie, you're not shocked?" Asked Mayu.
"No, I always knew that Yuki was a special girl who wasn't "like the others"." "But in reality, I don't mind being the aunt of superheroines."
Yuki opened her eyes and looked at the two females laughed and smiling with joy. Her stomach wasn't feeling well, but she knew that she needed to fulfill her duties. She slowly began to transform into a human.
"I'm ready to go!" She exclaimed.
Just then, her stomach gurgled and transformed into a cat again.
"Aw....." she said.
"Yuki, I think even your body is trying to tell you to rest." "Get some sleep."
Yuki closed her eyes softly as Suna kissed her on her head.
Now, that I know what's happening... I believe that I can help Yuki and Mayu. I may not have powers, but nothing will stop me from protecting my babies! Suna thought.