Okabe has seemingly done a time leap and is semi-amnesic.
Okabe finds a mail in his phone and realizes Mayuri might have been abducted.
Moeka Kiryu can have normal interactions with others.
The world keeps converging towards the three alternative nods when Okabe tries to “save” Mayuri.
After finding the whole story, Okabe realizes that Mayuri was never kidnapped, the “kidnapping notice” was simply a “cut-in-parts” D-Mail from Shinichi Nakase (Fubuki's brother), The cut-in-parts D-Mail made it look threatening and Okabe's paranoia, doubled with his amnesia after time-leaping made him misunderstand the whole situation.
Due to Okabe's amnesia, it is not revealed why Okabe had time leaped in the first place.