第 1 巻 (全 5 巻): お姉ちゃんの翠くん (Series) favorite_border

[DeepL Translation - needs review] Volume 1 Introduction: It's the beginning of an exciting and sad first love story. Sui is not very fond of her older sister's boyfriend, Midori, a college student, because he always treats her like a child and teases her, which annoys her!　But when Midori-kun tutors her, she begins to see an unexpected side of him...?

(Translator: DeepL)