Brand from Japan: Kose. The answer is introducing beauty serum to your hair.A new hair serum born from the wisdom of dermatological research that penetrates and repairs the hair to its core.Penetrates and repairs the hair to the core, smoothing it all the way to the ends.A water-based hair serum that is used as an introductory serum for hair before treatment.A hair serum for special care that penetrates into damaged hair with luxurious moisture to repair damage caused by dryness, coloring, friction, etc.Finishes with high-quality, smooth hair that stays moisturized all the way to the ends.How to use:Please use 2 to 3 times a week.After shampooing, lightly drain the water and apply 1-2 pumps directly to the damaged areas and let it absorb. A guideline is 4 pumps for medium-length hair. If you are concerned about damage, please add more depending on the condition of your hair.Leave it on for about 10 seconds, then apply your regular conditioner or treatment without rinsing.Rinse after this.I