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Ken Kubo is a normal man with a normal job who is besotted in a normal way with a female friend. But life turns distinctly abnormal when he meets an otaku, Tanaka, and is indoctrinated into the obscure world of anime, model guns, and garage kits. As Kubo finds himself shunned by those he cares about, he becomes only more determined to evolve into the ultimate being - the Otakuking! But Kubo is not the only one coming to terms with society. While he strives to mould the world into a perfect haven for people like him, otaku all across Japan are laying bare their strange, lonely lives for the first time… and it’s not a pretty sight.
The anime centers on Katsuko Yoshida, the cousin of Eagle Talon's Yoshida-kun, and an employee in Kemonomichi Electronics' "special general affairs" section. She educates her poorly informed colleagues about their misunderstandings of Sustainable Development Goals, the United Nations-backed goals for member nations to attain a sustainable future.