Snowman (2003)

They are both about a forbidden love story of a man who fall in love with two sisters. While 'Which Star Did You Came From?' is a light-hearted drama, 'Snowman' is more tragic.

Each of the dramas describes a forbidden love story between two people that are not supposed to fall for each other.

In snowman both the sisters fall in love with the ml while in autumn shower it is best friends. In both dramas the leads face criticism for their relationship and struggle to be together. Difference is that in snowman, the sister doesn’t wake from her coma while in autumn shower the best friend does. Snowman is a bit more light.

If you decide to watch either one you will realize they are very similar both girls know ml before sister gets married

The female leads in both cases lives with her sister and sister's husband and falls in love with her brother in law.