ありす、宇宙までも (Series) favorite_border

Volume 1 Overview: The dream: Japan's first female astronaut commander! Asahida Arisu is beautiful and well-liked by everyone around her. As a young child, she was raised bilingually by her parents — but after their death, she gradually lost her footing in both languages, leaving her struggling to keep up with her classes day after day. Then Arisu meets Inaboshi, a solitary genius who sees something others have missed. "I figured it out. What's happening with you, Asahida. It's semilingualism." ...