The text might be referring to episode 16 of a series that involves hypnosis or a similar theme, possibly titled "Saimin Seishidou" and featuring something related to a T-Rex or a character/model named Trex. The mention of "6 cen 20" or "20th century" could imply a setting or timeframe.
Saimin Seishidou OVAs are available on:
Always support the creators: Araiguma’s Pixiv and Fantia pages include manga chapters beyond the OVA. saimin seishidou trex ep16 of 6 cen 20 better
Without a clear understanding of the series, one can only speculate: The text might be referring to episode 16
Saimin Seishidou (Hypnotic Guidance) is a Japanese adult visual novel and OVA series created by Araiguma. It focuses on the psychological manipulation of female characters through hypnosis, exploring power dynamics, moral ambiguity, and taboo relationships. Always support the creators: Araiguma’s Pixiv and Fantia