Shoujoka Kenkyuu Shitsu Twintail Buchou

A man named Gregory, employed as a sales manager at the Dokuryu Group, unintentionally turns himself, the Chairman, and the Executive Director into young girls after sampling a new energy drink. Faced with the prospect of permanently losing his wife and daughter if the transformation is permanent, he agrees to participate in the company's "Girlification Research," using his own body as a test subject. Alongside other middle-aged men in a research lab, Gregory seeks a way to revert to his original form, while navigating the unexpected benefits and challenges of his new condition.