Aquadom

Tatsumi is an ordinary boy attending school and living under the watchful eye of his strict older brother. Having lost their parents at a young age, his brother has taken on both maternal and paternal roles for him. One day, while Tatsumi and his friends prepare to intervene in a situation where a beautiful girl is being harassed, she surprisingly handles her attackers on her own. Upon seeing Tatsumi, she abruptly calls him "Rui". What could this mean? Who is this mysterious girl? Why are there suddenly strange men targeting him? And why is his brother acting so differently now? (Source: MU)