The Irregular at Magic High School - Season 3 Episode 7 Steeplechase (3)
Overview: It turns out that the secret experiments that the Kudou Family has been conducting was for developing parasite dolls, a female combat robot possessed by a parasite. Experiments on the dolls' operations are being conducted at the Steeplechase Cross-country venue, where security is abnormally tight - so much so that Tatsuya himself can't even break into the premises. As such, Tatsuya orders Pixie to keep an eye out for the parasites while he conducts adjustments to the CADs and gives instructions to the underclassmen as an engineer. However, this continual sense of nervousness and nonstop days of hard work are tiring out Tatsuya. He's never felt this tired before.
Comment
This shiz is good, very in depth anime but poorly adapted ( manga is a lot more in depth)
Questionable/weird relationship between those two + all in all a simple anime. The guy is basically a "deus ex machina" (https://en.wikipedia.org/wiki/Deus_ex_machina) fixing problems in a harem-like-school so if you want to watch something simple & relaxing (knowing that in the end everything will always be ok) then this is the show for you. It's ok for me as it counterbalances my difficult/negative days at work. Overall a mediocre/not-too-clever anime, but still ok to watch it from time to time. Edit Oct.2020: Season #2 just started - similar but not too bad so far. Edit Dec.2020: Correction - watched the first 10 episodes of season #2 and I don't like it much.