Yuichi Hiiragi is a Japanese manga artist and writer, recognized as the original creator behind the series Please Put Them On, Takamine-san. Hiiragi is responsible for both the writing and illustration of this manga, which has been serialized in Square Enix's Monthly Gangan Joker magazine. The series began its run on January 22, 2019, and as of February 2026, eleven collected tankobon volumes have been published. The manga is licensed for English release in North America by Yen Press.

The series garnered enough attention to receive an anime television adaptation. This adaptation, produced by the studio Liden Films, aired from April to June 2025. The story centers on the student council president Takane Takamine, who possesses the supernatural ability to rewind time by removing an article of her underwear. When fellow student Koushi Shirota accidentally witnesses her secret, he is forced to become her closet, tasked with providing her with replacement undergarments whenever she uses her power.

Beyond his most famous work, Hiiragi has a history of manga creation dating back to at least 2010, with several other titles to his name, including works published in 2010, 2011, 2013, 2014, and 2017. The art style in Please Put Them On, Takamine-san is noted for its detailed and refined character illustrations. The work is primarily a romantic comedy that blends ecchi content with a central dynamic of pure love between the two main characters. Hiiragi's significance in the industry is demonstrated by the successful transition of his manga into a full anime series, marking him as a notable creator of romantic comedy and supernatural-themed manga for the shonen demographic.