Bought with my own money, Bancor Takui gray hair shampoo

Hair dye shampoos were all the rage at one point, weren't they? There was some controversy regarding the ingredients, but since it is said to be effective and contains safe, non-harmful ingredients, I have been using it after even waiting in line to buy it, paying over 20,000 won per bottle.

I received five bottles as a gift, and I'm on my second or third one now... As for the effect, hmm...

First of all, the foam isn't white but black, and that alone doesn't provide a dramatically effective result. I guess I'm just going to continue dyeing my gray hair as usual.