Well, it could be about a BTS member accidentally running into a gymnast YN at a sports event. Maybe they get to know each other gradually and BTS is inspired by YN's dedication in gymnastics. It could also involve YN getting a chance to perform at one of BTS's concerts, creating a unique and exciting plot.
Thor would likely be enraged. He has a strong sense of justice, and seeing the torture Bucky endured would make him want to seek vengeance on those responsible. He might also see Bucky in a new light, as a survivor of great pain and suffering.
She might be shocked. Naruto has had a really tough life and seeing all those memories of his loneliness, the villagers' hatred towards him when he was a kid, and his constant battles would be overwhelming for her. She could become more protective of Naruto, seeing him in a new light as someone who has overcome so much.
One way is through a charity event. BTS is often involved in charity work, and YN could be performing at a gymnastics - related charity event. They meet there and start interacting. Another way could be if YN is a back - up dancer for another K - pop group and during a big K - pop concert, BTS and YN cross paths.
They might be shocked. Luffy has so many wild and dangerous adventures in his memories. His friends would probably be in awe of how much he has endured and how strong his will is.
They might be shocked at some of the dangerous situations Peter has been in without their knowledge. They could feel guilty for not being there to protect him more. And they would likely be very proud of his selfless acts.
Boruto might be in awe. He'd see Naruto's incredible journey filled with hardships and triumphs, and he'd probably feel a sense of pride in his father. He might also feel a bit guilty for sometimes not understanding Naruto's responsibilities as Hokage.
The teachers would likely be very sympathetic. Dumbledore might nod knowingly at some of Harry's memories, especially those related to his discovery of the truth about his family and Voldemort. McGonagall could be seen with a sad yet proud look as she witnesses Harry's growth through his memories.