Telepathy Shoujo Ran EP16 - Rui, in the Edo Period: SOS Through Time

Ran and the others find the man who gave the box to Rui, and Ran and Midori find a time portal in his store house which they use to travel back in time to be with Rui. Rui uncovers an undercover law enforcer working where Rui is being held, and enlists his help to find O-Ran who went missing. After finding her, they also uncover that the proprietor, Kichibee Narukoya, has been breeding strange bugs called darkness demons and selling them in combs for a fortune. Naruyoya tries to have them killed, but Ran and Midori use their powers to escape. Ran and Midori lend their powers to Rui, and they destroy the darkness demon possessing Narukoya. Ran, Rui and Midori travel back to their own time with the help of the two combs.