春の呪い: 1

[DeepL Translation - needs review] Volume 1 Introduction: My sister is dead. Her name was Haru. She was only 19 years old.　Natsumi, whose sister was her everything, started dating her fiancé, Hiiragi Togo, for family reasons after Haru's death....　The seasons with the man who stole her sister's heart begin to turn.　The long-awaited first volume of the much-talked-about first serial work by a newcomer!

(Translator: DeepL)