The Intrigues of Itsuki Koizumi-kun (古泉一樹の陰謀 (Koizumi Itsuki no Inbou)) is a manga series by Puyo. The first issue was published in Japan on April 18, 2012, in the May edition of Altima Ace.
- ↑ 2012-02-27. Haruhi-chan's Puyo to Launch Itsuki Koizumi Spinoff Manga. Anime News Network. Accessed 2012-03-03.