Hair serum that keeps even dry, brittle hair soft

This is the Mise en Scène Perfect Serum. I have been using it consistently for several years. Now that summer has arrived and it is more humid, I have been craving my hair straightener, which had turned it into a broomstick, so I was worried. However, when I apply this serum to my dry, frizzy hair, the split ends and damaged strands immediately become soft. It has a sweet floral scent, so it is pleasant to use as well. The softness lasts for about a day, so it is perfect for daily use.