Mise-en-scène Serum, bought with my own money

My personal favorite hair care item, purchased with my own money, is the Perfect Mise-en-scène Serum. I apply it for protection after removing moisture and before blow-drying, and then apply it again after styling. It makes frizzy hair shiny. I have settled on this as my treatment and have been using it for several years now. It smells great, and the fact that the effect lasts a long time is also a plus!