(Relatively) grounded anime with little to no fantasy elements
Anime
Note that for the purposes of this stack fictional advanced technology does not fall under "fantasy" and therefore is eligible. When I say "fantasy" I mostly mean characters flying around shooting laser beams out of their hands and stuff like that.
Only first seasons of multi-season series are eligible for the stack. No films are eligible for the stack.
Only first seasons of multi-season series are eligible for the stack. No films are eligible for the stack.

TV, 1998,
26 eps
Me:-
Author:-
*Involves advanced technology such as interstellar travel, but otherwise fairly grounded.

TV, 2006,
37 eps
Me:-
Author:8
*"(Relatively)" definitely applies here, as the Shinigami and Death Notes themselves are fantastical elements, but the human characters all operate like real life.
Koukaku Kidoutai: Stand Alone Complex
Ghost in the Shell: Stand Alone Complex

TV, 2002,
26 eps
Me:-
Author:-
Kaguya-sama wa Kokurasetai: Tensai-tachi no Renai Zunousen
Kaguya-sama: Love is War

TV, 2019,
12 eps
Me:-
Author:-