Tokidoki Bosotto Russiago de Dereru Tonari no Alya-san

Masachika Kuse sits next to Alya, a girl of Russian and Japanese descent. She's beautiful, haughty, and an exceptional student, while Masachika is nerdy and known for being a slacker. He's an easy target for her comments in Russian, which she's all too happy to translate—except he can understand what she's really saying!

(Source: K Manga)