Haruki is not a typical shonen protagonist. He doesn't scream his motivations. He doesn't have a hidden power. He is just a boy on the verge of becoming a man, terrified that he is turning into the wrong kind of adult.
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Notable production elements
: The story plays heavily on Ryuuki’s admiration for his sister and his sudden awakening to adult interests through the character of Kirill. shounen ga otona ni natta natsu episode 1 best