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Reina Saeki is a teenage genius obsessed with the mysteries of the universe, spending her days in the quiet of her lab, chasing big questions that most adults can’t even dream of. But despite her sharp mind, Reina has trouble with one big mystery: people. Known as the “Ice Queen” by her classmates, Reina feels more comfortable with science than socializing, often avoiding others and coming across as cold and unapproachable.

That begins to change when her younger brother, Hiro, nudges her to try being a little friendlier. Soon, Reina’s small attempts to connect start drawing a few classmates closer to her—especially Himari, who admires her intelligence; Ayumi, who’s full of energy; and Kaito, a calm artist with a thoughtful nature. Little by little, Reina learns that making friends isn’t as simple as solving a problem. It’s messy, awkward, and sometimes confusing, but it’s also rewarding in ways she never expected.

As Reina’s personal journey unfolds, she realizes that understanding the people around her is just as meaningful as exploring the universe. Kodoku na Uchū no Kodomo is a heartfelt story of friendship, growth, and the challenges of opening up to others in a world that can feel as vast and unknown as outer space.

Table of A Lonely Child of Space

Table of contents

Volume 1

Volume 2