Another piece of the puzzle falls into place, as Mihoshi explains her reason for being in the mines: she came to investigate a possible time crime, and decided to give Yuki a hand trying to find a treasure, even though she doubts there’s anything there.
Yuki begs to differ, and flanked by Beni, Rui, and Gouriki, offers to show Tenchi and the others proof. Meanwhile, Touri, Hachiko and Hana are convinced Tenchi was taken away for nefarious purposes and formulate a rescue plan as an incredulous Momo looks on.
Yuki produces a smartphone that was found deep in the caverns and has determined it is from 1,300 years ago, making it an OOPArt (not ‘oppai’, Ryouko. That was too easy). This, of course, is the phone Tenchi dropped into a chasm when he was in the past.
When Yuki switches it on, everyone is less shocked that Tenchi is on the 1,300 -year-old wallpaper than they are skeeved out by the fact he’s posing shirtless with a loli swimsuit-wearing Sasami.
Up above the caverns, Touri, Hachiko and Hana begin their mission, starting with getting past an improved Gouriki. How far will they go before they realize they’ve got the wrong idea?