Alternative title:
Tokidoki Bosotto Russia-go de Dereru Tonari no Alya-san (Japanese)
Иногда Аля внезапно кокетничает по-русски (Russian)
時々ボソッとロシア語でデレる隣のアーリャさん (Japanese)
Genres: comedy, romance
Themes: ecchi, Russia, school
Synopsis:
Smart, refined, and strikingly gorgeous, half-Russian half-Japanese Alisa Mikhailovna Kujou is considered the idol of her school. With her long silver hair, mesmerizing blue eyes, and exceptionally fair skin, she has captured the hearts of countless male students while being highly admired by all others. Even so, due to her seemingly unapproachable persona, everyone remains wary around the near-flawless girl.
One of the few exceptions is Alisa's benchmate Masachika Kuze, a relatively average boy who spends his days watching anime and playing gacha games. Despite his nonchalant demeanor, Masachika is the sole student to receive Alisa's attention. Unable to be fully honest, Alisa is frequently harsh on Masachika and only expresses her affection in Russian. Unbeknownst to her, however, Masachika actually understands the language yet simply pretends otherwise for his own amusement.
As the odd pair continues to exchange witty and playful remarks, their relationship gradually grows more romantic and delightful—and Alisa might finally learn to freely convey her true feelings. -MAL
Links: ANN, AniDB, MAL, Official.
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The troll sister upped the fun. There's no dense MC; in fact it's quite the opposite. Given that she's his sister, they kept it logical that she'd know he studied his ass off to learn Russian and knows exactly what Alya is saying.
The two girls are going to be running for president with him nominated as VP for both teams.