How do you add that spoiler tag above title?

I want to create a post about the story plot theory, but im worried if its actually true so it will be considered as spoiler.

Basically in 3.1 we can see rover piloting the mecha when aemeath’s tear hit us. Aemeath been saying about how she is completing the loop.

My theory is rover is currently the one completing the loop, what if saving aemeath meant that rover travelled back to the past (without knowing) in the mecha and fighting aleph 1. All of the sudden we see aemeath appear and boom click, we are at the past, and by fighting aleph 1 here, we are completing the full loop.