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Link juice will pass through redirect, so you can use 18 -years-old .com as a preferred domain.

Well it's quite difficult to judge the quality of the content as I don't understand what is written on the page. What I did notice is that each time I clicked on a link a new tab which advertising (https://trafficnado.com...) was openend (without me requesting it) or that a pop-up was blocked. Google does consider this to be quite spammy techniques, so could be the cause why this page has suddenly disappeared from the results. Not sure about the content - seems you are streaming series. Are you the copyright holder for these ? If not, this could also be the reason why your site did disappear from the results (DMCA complaint) Dirk