The Laughing Salesman - Season 3 Episode 10 Self-service Drink Area

The lyricist Nikken, is not feeling well and Moguro introduces him to special drinks made from exotic ingredients, however he is not allowed drink anywhere else. The drinks not only improve his health, but improve his work output and he creates a successful drink campaign. However, after he drinks some of the product delivered to his home from the sponsor who used his work in the commercial, he turns into a root vegetable.