Very Familiar
Ever since that day, Yuuta had gone missing from the real world. The first one to notify the authorities was Sakurai Rin, who had an inkling to report it when his son didn't return home that day. The second report came from Shiki, and then from Yui. And pretty soon, Yuuta's disappearance became popular worldwide.
Popular actors, actresses, and influencers all asked for everyone's cooperation as they searched for Yuuta all across the globe. Since he couldn't be found in his country, they thought that maybe he was brought to another country by someone else. Nevertheless, no one knew what really happened. Even the authorities could only do so much when it comes to a missing person. It's a literal representation of finding the needle in the haystack after all.