Haru no Noroi (2021)

Other name: 春の呪い , Curse of Spring , Spring Curse , Haru’s Curse

Synopsis:

Natsumi just lost her younger sister, Haru, to cancer. As her sister’s coffin finally closes for the last time, she whispers, “Wait until your big sister comes to you. I’ll be there soon, okay?” However, Haru’s fiancé, Tougo has other plans which might mend both their hearts.