Slow Transmigration: Following My Heart

World One: Make the most of your youth and study hard (complete, no romance; the main plot is about studying hard, with a larger world setting introduced later.)

World Two: The Sixties: The girl who was made a sacrificial pawn (the main plot is bringing prosperity to her hometown, then punishing her sister-in-law. No romance, complete. Not sure if this counts as a deal-breaker: the heroine gets married for her future, but has no children; it's a marriage of convenience.)

World Three: Saving the mother who ran away while pregnant (no romance)

World Four: The materialistic female streamer (no romance, ongoing)

World Five: Doomsday symbiote (not started)

[I don't read comments much, so feel free to share your thoughts. I occasionally fix typos, so if you spot one, please give me a gentle heads-up. I sometimes make mistakes when typing.]