Objectify4 requests a list attribute with a list condition

I have an object named Guy that has a girlfriend attribute type Key []

Given the list of Longs that are Girl identifiers, I want to ask all the guys who have one of these girls as a girlfriend.

For example (Guy: gilfriends):

 LuckyGuy: {a,b,c}
 Guy1: {b}
 Guy2: {c}

I want g, for example:

 g({a,b}) = LuckyGuy, Guy1
 g({c})) = LuckyGuy, Guy2

I could do a loop:

for(i..n)
    resultSet.add(
        objectifyFactory.begin().load().type(User.class).filter("girlfriends", girlfriendId[i])
    );

But I'm sure there is a direct strategy.

Any idea?