Spoiler for Laser weapon in the LN:
Maybe the laser has heat and light at different speed like we already see the laser passing us but the heat wave is still on the way here.
Because it's impossible to react against the speed of light, noway even with 100x human reflex.
BTW, I'm thinking about making a rough sketch fanart for this series (I don't have time to polish my works since I'm still learning how to draw) as a concept art. My idea is to have Miyuki and Tatsuya embrace each other with destroyed buildings and machines as background. But I can't decide which pose I should use or which condition should they be in (Tatsuya can fix anything right away, so damaged cloth or a few injuries are...).