I'm not sure specifically what that particular fanfic is about as there could be various interpretations. It might be a fan - created story that combines elements of Goku (from Dragon Ball) with milk and lemon in some creative and perhaps strange or unique way.
One great 'Goku y Bulma fanfic' could be one where they go on an adventure together to find a rare Dragon Ball. In such a story, their different personalities, Goku's naivete and Bulma's intelligence, would create interesting interactions.
Another place to look is some Dragon Ball - centered forums. Fans often share their own created fanfics there. You might have to do a bit of searching, but it could be worth it to find some unique 'Goku y Bulma fanfic'.
I'm not sure where you can specifically find this fanfic. You could try searching on popular fanfic websites like Archive of Our Own or FanFiction.net, but there's no guarantee it will be there.
Finding a 'Black Goku y Milk' black anime fanfic might be a bit of a challenge. You could start by looking at the tags on popular fanfic websites. Maybe search for tags related to Black Goku and then look for any that might be related to food or strange elements like milk. Another option is to follow some well - known fanfic writers in the Dragon Ball fandom and see if they have ever experimented with such an idea in their works.
If Barry kidnapped Supergirl in fanfiction, it could be a really interesting plot twist. Maybe Barry has been affected by some sort of red kryptonite - like substance that makes him act out of character. This would lead to a conflict between the Flash and Supergirl's friends and allies. They would be confused as to why Barry would do such a thing.
One inspiring Supergirl story is her fight against powerful villains to protect Metropolis. She uses her super strength, flight, and heat vision to keep the city safe. For example, when a group of alien invaders threatened the city, Supergirl was the first to stand up and fight them off, showing great courage.
Perhaps 'y' is a relative of Harry's that was thought to be dead. This relative could have a unique magical heritage that they pass on to Harry, making him even more powerful. For example, if 'y' was a distant cousin from a line of powerful seers, Harry might develop some precognitive abilities.