I want to make this one more popular
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Tokidoki Bosotto Roshia-go de Dereru Tonari no Alya-san - MangaDex
https://mangadex.org/title/6bf844c8-2ce4-401a-a761-3151042efe30/tokidoki-bosotto-roshia-go-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!
It's originally a Light Novel under the same name. And it'll be adapted into anime next year.