Without knowing what 'three gu' and 'a b' are, it could be that the girl is on a quest with three gu (if gu are some items) and meets a b (if b is a being). Maybe they go on an adventure together.
Let's consider different possibilities. Maybe 'gu' is a magical element. The girl is in a world where she has to find three gu to solve a big problem. 'A b' could be a boy or a beast. If it's a boy, they might fall in love during the search for the three gu. If it's a beast, she might have to tame it to get the gu.
Since the description is rather ambiguous with these unknown terms 'three gu' and 'a b', it's difficult to come up with a proper story. Maybe you could clarify what these are?
The girl might be a scientist studying snakes. She discovers this sexy snake which has unique characteristics. As she tries to study it, she realizes that the snake is more intelligent than she thought. They develop a bond over time as she learns more about the snake's behavior and the snake gets used to her presence.
The plot could be that the girl is a huntress. She has been tracking a muscular werewolf that has been causing trouble in the village. But when she finally catches up to it, she sees that the werewolf has a kind of intelligence in its eyes. Instead of killing it, she tries to communicate with it. The werewolf, with its muscles tensed at first, gradually relaxes and they form an alliance to fight against a greater evil that is threatening both the forest where the werewolf lives and the village of the girl.
The boy might be doing some sort of wacky facial exercise when suddenly his face makes a fart - like sound. The girl witnesses it and is amused. They end up having a conversation about how strange and funny the situation is.
A story could be that the girl is a volunteer at an animal shelter. One day, a nude dog is brought in. She calls in the veterinarian. The vet examines the dog and finds that it has been severely malnourished, which has led to its fur loss. The vet starts a special diet plan for the dog. The girl is in charge of feeding the dog according to the plan. As the dog gets better, its fur starts to grow back. The girl and the vet are proud of the dog's transformation and they find a loving home for the dog together.
A girl named Sophia woke up one morning to find the sunlight streaming through her window. She got up and went outside. She followed the path of the sunlight into the garden. There, she saw a beautiful butterfly that seemed to be dancing in the sunlight. The girl felt a sense of joy and decided to write a poem about the moment. The sunlight had given her a creative spark.
In a short story, the singing girl could be a little girl with a beautiful voice. The airplane is crying because it's about to be decommissioned. The girl doesn't understand the real reason for the strange noises but she sings a song of farewell. Her innocent song touches the hearts of everyone on the plane, including the pilots, and they have a very emotional flight as they think about the end of the airplane's service.
A possible plot could be that the body girl is a new character in town. Shaggy first spots her near an old, creepy cemetery. He's so scared that he runs to tell the gang. When they go back to investigate, they find out the body girl is actually a scientist doing research on the cemetery's old tombs. She was just wearing an old - fashioned dress that made her look spooky. Shaggy then realizes he overreacted.
In a small village, there's a barefoot girl named Mary. The local kids, in an attempt to have some fun, decide to play a game of slow tickle torture on her. They start by tickling her ankles slowly. Mary tries to run away but slips on the grass. This makes everyone laugh more. However, as the tickling continues, Mary starts to laugh too and soon they are all rolling on the grass having a great time.
In a little town during Christmas, a girl named Rosie noticed a wimpy boy named Billy. Billy was always picked on by other kids. One day, Rosie saw Billy being left out of the Christmas caroling group. She went to him and said they could make their own little caroling group. They walked around the snowy streets singing Christmas songs. The people in the houses they passed were charmed by their voices. This made Billy feel special and not like a wimp anymore. It was a simple yet heartwarming Christmas story for both of them.