The higher-pitched flute during the title card announced that this would be the first “period” episode of ATM! since the 13th, but it decided to go back even farther than that to show us the connection between Momo and Beni. Beni, AKA Kurenai, was appointed the guardian of a baby Momo and the Jurai Royal Family gave her a spaceship, which she proceeded to crash land on Earth.
Tenchi, it would seem, hasn’t been as clueless as we thought, and once his mission of finding both Momo and Beni is complete, he hits the Reset Button on his smartphone (God, I love it when literal reset buttons pop up in shows!). An error occurs (he probably forgot to update the OS), everything goes dark, and a tear in the sky appears, sucking Tenchi and Momo in.
You gettin’ all this? Good. I guess the show will pick this back up in episode 41.