Inspired by Yu Hashimoto's eponymous Japanese manga series, 2.5 Dimensional Seduction (also known as 2.5-jigen no Ririsa) is a harem anime. The hilarious series follows a second-year high school student named Masamune Okumura whose traumatic past experiences with women have turned him into an obsessive otaku who can't help but daydream about his favorite manga character, Lilliel.