真剣で私に恋しなさい！Ａ （アペンド）は「真剣で私に恋しなさい！シリーズ」で 出てきたキャラクター達との恋物語を楽しむ学園コメディです。 各ヒロインは「真剣で私に恋しなさい！Ｓ」のオンラインアンケートを中心とする 様々なご意見、結果を参考にしつつ、決めています。 【A-1】 ・攻略キャラ：武蔵坊弁慶、忍足あずみ、黛沙也佳 【A-2】 ・攻略キャラ：葉桜清楚、九鬼紋白（Sの後日談）、クッキー4IS 【A-3】 ・攻略キャラ：李、ステイシー、松永燕（Sの後日談） 【A-4】 ・攻略キャラ：大友焔、林冲 【A-5】 ・攻略キャラ：源義経、橘天衣、マルギッテ（Sの後日談）

Kawakami City is famous for its strong dedication to its samurai ancestors. A strong fighting spirit is always valued and it's even an important factor in succeeding in school there. Yamato, a second year student from Kawakami Highschool is always with his close friends (4 boys and 3 girls). They have known each other since they were young and have done loads of things together. They have many other friends, but these seven people are a close-knit group, they even have a secret base where they meet... With the new semester, they welcome two girls into their group and shortly after things start to change...