Well, that's hard to say. Kawaii is a subjective perception. It could be based on your expressions, style, or the way the artist portrays you in the comic.
Kawaii usually refers to cute and sweet characters. Here are some famous Kawaii characters:
1 Bunny Detective Agency's Bunny Girl (Bunny Detective Agency)
2. Little Burial
3 Pikachu
4. Boya Hancock (One Piece)
5 Snow Rabbit ("Full-time Hunter")
6. Takashi Natsume in Natsume's friend's tent (Natsume's friend's tent)
7 Amagasaki Ichigo (Death)
8 Hatsune Miku ("New Era Evangelion Warrior")
Athena of the Stardust Fighters (Stardust Fighter)
Super Dream (Super Dream)
Of course, this was only a part of the Kawaii cartoon characters.
Kawaii girls can craft a cute story by starting with an adorable character, like a little bunny. Then, they can add a simple but sweet plot, such as the bunny's adventure to find a magical flower. And use lots of cute descriptions, for example, 'The bunny hopped through the meadow filled with the fluffiest grass and the prettiest daisies.'
Well, it could be about a really cute and fun game story designed to help people learn Japanese. Maybe it has characters like kawaii animals that guide you through different Japanese language lessons within the game.
A little girl with a big heart could be the main character. She has a magic wand that she got from a mysterious old woman. With this wand, she can transform ordinary things into kawaii versions. For example, she can turn a dull tree into a tree with heart - shaped leaves. She uses her powers to make the world around her a more beautiful and happy place.
A kawaii game story could be about a little cat who goes on an adventure in a magical forest filled with talking animals. The cat is trying to find a special flower to save its sick friend. Along the way, it meets a friendly bunny who guides it through the forest's secrets.
I'm not sure specifically which 'tsundere wife and kawaii kid' story you are referring to. There could be many fictional works with such themes. It might be a story from a manga, anime or a light novel. Maybe it's about a wife who is tsundere (initially cold but gradually shows her warm side) and a really cute kid, and their daily interactions, like how the wife takes care of the kid while still maintaining her tsundere personality.
Firstly, the theme should be something that is associated with cuteness, like friendship among cute animals. Secondly, the expressions of the characters are crucial. Big, shiny eyes and cute smiles can make the characters more endearing. Also, the rhythm of the story is important. A gentle, flowing rhythm, like a soft lullaby, can make the story more charming. For example, short and sweet sentences can create this kind of rhythm, like 'The puppy wagged its tail. It was so happy.' which makes the whole story feel more kawaii.