Tokidoki Bosotto Russia-go de Dereru Tonari no Alya-san  

Tokidoki Bosotto Russiago de Dereru Tonari no Alya-san, My Deskmate Alya Sometimes Hides Her Feelings in Russian, Иногда Аля внезапно кокетничает по-русски, คุณอาเรียโต๊ะข้างๆ พูดรัสเซียหวานใส่ซะหัวใจจะวาย

Meet Masachika Kuze, a disinterested first-year student at Seirei Academy who enjoys playing gacha games or sleeping during classes. Despite his reputation as a carefree slacker, he catches the attention of Alisa Mikhailovna "Alya" Kujou, the admired "solitary princess" who sits beside him in class. Alya is highly respected by her peers due to her captivating appearance and impeccable behavior. However, she harbors a secret: while she frequently scolds Masachika for his indiscipline, she expresses her true feelings with affectionate and flirtatious remarks in Russian. Unbeknownst to Alya, Masachika comprehends every one of her comments because he is fluent in Russian. Perplexed by her mysterious behavior, Masachika chooses to feign ignorance and play along, resulting in an unusual and endearing relationship with the enchanting girl.