I've heard a few where it was just a prank gone too far, but no serious harm was done.
I've heard of cases where it was part of a consensual and playful bedroom activity.
I've heard some pretty wild ones where it was all just a prank gone wrong.
It makes the game more engaging. When there's a story behind the game, players feel more connected to the gameplay. For example, in a game like 'The Witcher', the story of Geralt of Rivia draws players in and makes them care about his adventures.
There could be a story set in a magical world where girls are the protectors of a special place. When some naughty boys try to steal a magical item, the girls use their unique tying skills (maybe with enchanted ribbons) to tie up the boys until they learn their lesson.
One important element is consistency. The ending should be consistent with the overall tone and genre of the story. For example, a comedy should end on a light - hearted note. Another element is foreshadowing. If you've dropped hints throughout the story, make sure they are paid off in the end. Also, character development matters. The characters should end up in a place that makes sense based on their growth during the story.
One common theme could be trust. It shows that in an unconventional situation like this, the man trusts the woman enough to be in a vulnerable position. Another theme might be power dynamics, where the roles are reversed from the traditional male - dominant ones.
I don't know much about such real stories. Maybe it's a rare and unusual situation.
One story could be that the siblings were constantly fighting over toys. Mom had warned them many times, but they didn't listen. So, in the end, she spanked them to teach them a lesson about sharing and getting along.
There was a story of two sisters who were dancers. They both had very different feet shapes. One had wide feet and the other narrow. But they worked together to find the right shoes that would fit both of their feet so they could practice and perform together. This shows how they overcame differences related to their feet for their common passion.
In some fictional adventure books written by indie authors, there could be a plot where girls tie up boys. This might be part of a survival situation where the girls need to keep the boys from doing something dangerous, like running into a dangerous area filled with traps. So they use vines or ropes to tie them up until they can all figure out a better plan together.