Masamune Okumura isn't just an otaku, he's an uber otaku whose fixation on a certain character has left him completely uninterested in real girls. Until, that is, Ririsa, a girl with an interest in cosplay decides to join the school manga club that Okumura runs... and wants him to take pictures of her as his favorite character, Liliel! Suddenly Okumura finds himself conflicted, as while Ririsa isn't really Liliel, she seems so close to his fantasy and exists in 3 dimensions! And when other girls start suddenly joining the club, will he ultimately be able to resist the 2.5 DIMENSIONAL SEDUCTION!