Roasting mages with modern science. "I made it so it won't [blow away]."
Side note,
I'm kinda miffed that his PTSD about going outside wasn't as big a plot point as it was made out to be. Could've made for some interesting character development, but I guess this is an isekai harem manga after all.
The isekai and the fantasy aspect is really pretty good, i have no qualms with the MC's personality. but why does the author focus so much on the time he was a NEET. Brief POV shots are more than enough but a detailed drawing of his fat ugly self is so out of place