The suggestion of "two steps back" as the next chapter title seems like a possibility, but keep in mind idioms like that don't necessarily exist in other countries, so I wouldn't take it as a guarantee. If that is the title, I'd expect them to find Ookuma's parents at her apartment and the joke transitions from Kanda hiding her gender from Ookuma to Ookuma and Kanda both having to hide her gender from the parents.
In fact even if that isn't the title, that feels like a pretty likely plot twist at this point.