Attack on the Pin-Up Boys, also known as Flower Boys' Series of Terror Events or simply Flower Boys (Korean: 꽃미남 연쇄 테러사건; RR: Kkonminam Yeonswae Tereosageon), is a 2007 South Korean high school mystery comedy film, and is the first film produced by SM Pictures, a subsidiary of SM Entertainment. It is also the first full-length film directed by Lee Kwon. The film stars all members of the boy band Super Junior, with the exception of Kyuhyun who was injured and still recovering from a car accident on 19 April 2007.

The story centres around a series of attacks on popular high school students or commonly called flower boys that occurred on the 14th of each month, which started on Valentine's Day. Some students — Kibum (played by Kim Ki-bum) and Donghae (played by Lee Dong-hae) — decide to investigate the incidents and find the culprit, while some targeted students; Heechul (played by Kim Hee-chul) and Kangin (played by Kim Young-woon) try to bait the culprit into attacking them so as to raise their popularity.

The film premiered on 16 July 2007 at Megabox Sinchon in Seoul and was released theatrically on 26 July 2007 in South Korea. It received seven nominations at the 2007 Korea Movie Star Awards.