Bernadette's photograph [Diakko one shot]

Four years have passed since Akko arrived at Luna Nova. In the previous year, the girls she had befriended graduated from the academy and each one went their separate ways, just like Kagari, who had to go through a lot during her studies, including meeting a girl named Diana Cavendish, whom she began to date. When she graduated and was sure she would return to Japan, she received an invitation from the Scottish girl to live in the family's mansion and an affectionate proposal from the beautiful blonde who asked her to marry her.
Akko spent a long time adapting and experiencing many ups and downs, sometimes having to deal with Daryl and her daughters' disrespect, but this the girl got used to, even more so with the fact that Diana was a lesbian, shocking the entire noble class.
One day like any other Akko was rummaging through Bernadette Cavendish's old bedroom until he found something that had been a huge family secret until then.
Upon discovering this secret Akko, decides that she wants to make a surprise involving the photograph she eventually found, but why is a photograph a secret and why does it get to the point of creating so much?
Read this story and find out.