弟の距離感がバグってます (Series) favorite_border

[DeepL Translation - needs review] Volume 1 Introduction: Hana Yoshida, a first-year high school student, falls in love at first sight with her classmate Taisei. I want to be the closest person to him. Hana's wish is fulfilled when her parents remarry and the two become sisters and brothers. Hana cannot hide her confusion at the sudden start of their life together. She tries to put her feelings away and resolve to be a good family member, but she can't stop feeling nervous every day because ...