One great 'Batman Forever' Bruce and Chase fanfiction could be 'The Unseen Bond'. It delves deep into their relationship, exploring how Bruce's dual identity as Batman affects his connection with Chase. It has some really intense emotional scenes where Chase starts to suspect Bruce's secret but still stands by him.
I also like 'Bruce and Chase: The Hidden Romance'. This fanfiction focuses on the romantic aspect of their relationship. It beautifully describes their stolen moments together, how they communicate without words at times, and the challenges they face in keeping their relationship alive while Bruce is constantly dealing with his Batman duties.
There's a fanfiction titled 'Chase and Bruce: A New Dawn' which is quite interesting. In this, after the events of 'Batman Forever', Bruce and Chase decide to work together to clean up Gotham in a more civilian - led way. It shows their growth as characters and how they support each other in different situations.