cheek_squisher's manga / #UGHHHHHHHHHHHHH UPDATE PLS(3)

really, really good the story is about a maiden who was sacrificed to the Land before Dawn (a dimension where its too dangerous for humans to survive in due to miasma and monsters) for her younger adopted sister. The sacrifice was mainly because of her childhood crush's demand, and her guilt from her stepparents. Time has passed and she aged 23 years older. Now 43 years old, the gate for the dimension opened, revealing a young man who exactly resemebles the FL's childhood crush. It was revealed that the man is the crush's and younger stepsister's eldest son. Last read was that the ML was finding himself adoring the FL, while the FL is getting flustered and starting to fall too.