There Is Definitely Something Wrong with My Time Travel

I used to be a killer, but now... I'm just a squad leader of the "Special Forces Against Unknown Creatures". Before I received this damn mission, I thought my time-travel life was pretty good. But, who can tell me, who is that red and silver 40-meter-tall giant with a dart on his head behind me? ! What is that 40-meter-tall thing with spikes on its chest, two horns on its head, and a big tail? ! Damn, what is the steel thing that the helicopter pulled over? ! That's Gundam, right? ! I'll go. There is definitely something wrong with the way I open my time travel! ! ! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.