日本語が話せないロシア人美少女転入生が頼れるのは、多言語マスターの俺1人

[DeepL Translation - needs review] Volume 1 Introduction: Iori Kagami, a sophomore in high school, is a boy who does not stand out in any particular way. He is disliked by some students because he does not get along with his twin sister, Shiori, who is known as the idol of the school year. Iori works part-time as an interpreter, but his ability to speak multiple languages is one of the few skills he is "aware" of. One day, a female military officer who lives next door to Iori's apartment sud...