Wait, I don’t understand, what the heck is going on?
It’s really quite simple, Fuka-san: Momo and Beni activate a new search app on the smartphone that shows them the treasure they’re looking for is directly beneath them, despite the face they were standing on a totally random spot. Also, Touri has a thing for Sasami. Upstairs, Ryouko destroys Hachiko’s swords, inadvertantly turning her into a bawling child. I guess she hadn’t overcome that weakness after all!
They dig and hit paydirt: a Juria Sword, which when grabbed by both Momo and Beni completes the tripartite sword that unlocks the Jurai starship buried below; the very ship that brought Momo and Beni to the planet to begin with. Now we’re getting somewhere!
Like Ryouko, Ayeka has no trouble making her opponent tap out (and swear fealty). Then they feel the upheaval going on downstairs as if it were and earthquake. The earth does indeed quake and rend below, and Beni must make a choice between grabbing the sword and ‘taking back who she really is’, or accepting Tenchi’s hand and accepting who she is, who Momo loves regardless. She choses the hand, and the ruins and the building above them collapse. Perhaps it was for the best.