2.5 Dimensional Seduction (Japanese: 2.5次元の誘惑, Hepburn: Nitengo-jigen no Ririsa) is a Japanese manga series written and illustrated by Yu Hashimoto. It began serialization on Shueisha's Shōnen Jump+ website in June 2019. An anime television series adaptation produced by J.C.Staff premiered in July 2024.
Masamune Okumura is a second-year high school student who serves as the president and only member of his school's manga club. An otaku, he claims he has no interest in real girls due to his obsession with a fictional character named Liliel (リリエル, Ririeru). Suddenly, a first-year student named Lilysa Amano, who is passionate about cosplay, joins the club and recruits Okumura to be her official photographer. When Okumura learns her favorite character is also Liliel, he finds himself conflicted about his romantic feelings towards her. Other girls soon join the club as well.
Okumura is a second-year high school student who is the president of his school's manga club. He is an otaku who is obsessed with a fictional character named Liliel. His mother abandoned his family when he was young.
Lilysa is a first-year student who joins the manga club. Due to her passion for cosplay, she recruits Okumura to be her photographer. Like Okumura, she is also a fan of Liliel. She was first inspired to become a cosplayer when she visited a cosplay event.
Mikari is a first-year student who is Okumura's childhood friend and Lilysa's classmate. A gorgeous and popular model, she has had a crush on Okumura since they were young, though he has never noticed.
Mayuri is a popular new high school teacher who becomes the advisor of the manga club. She is a former cosplayer known as Mayura (まゆら), one of the four Heavenly Queens of Cosplay.
Written and illustrated by Yu Hashimoto, the series began serialization on Shueisha's Shōnen Jump+ manga website on June 15, 2019.[7] As of July 2024, the series' individual chapters have been collected into twenty tankōbon volumes.[8]
In June 2021, Seven Seas Entertainment announced that they licensed the series for English publication under their Ghost Ship imprint.[9]
An anime television series adaptation was announced on December 10, 2022.[41][42] It is produced by J.C.Staff and directed by Hideki Okamoto, with scripts written by Takao Yoshioka, character designs handled by Tomoyuki Shitaya, and music composed by Hiroaki Tsutsumi.[43][2] The series premiered on July 5, 2024, on Tokyo MX and other networks,[4] and will run for two consecutive cours.[6] For the first cour, the opening theme song is "Shattāchansu" (シャッターチャンス, "Shutter Chance"), performed by Meychan, while the ending theme song is "Watch Me", performed by Kaori Maeda and Akari Kitō as their respective characters.[44]Sentai Filmworks licensed the series in North America, Australia and British Isles for streaming on HIDIVE, and in Brazil and Mexico for streaming with local dub on Anime Onegai.[45][46]
Masamune Okumura is an otaku, president and only member of his high school's manga club where he worships the character Liliel from The Ashford Chronicles. Such is his love for her that he completely ignores all real girls. One day, a first-year student named Lilysa Amano visits the club and is determined to join. Okumura attempts to deter her but she proves to be as much of an otaku as him, plus she too loves Liliel and wants to cosplay as her. Okumura decides to approve her club membership but is shocked when she starts stripping right in front of him so she can show off her Liliel costume. The next day, he struggles to deal with Lilysa before he realizes that she might just be the perfect otaku friend for him. This lasts only until the zipper gets stuck on her Liliel costume. While helping her, he ends up inadvertently holding her bare breast in his hand. At first she seems unaffected, but after Okumura flees in embarrassment, she is shown to have become excited, though she believes she is just coming down with a fever.
2
"Cosplay Group Potential?" Transliteration: "Awase no Yokan" (Japanese: 併せの予感)
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July 12, 2024 (2024-07-12)
A model named Mikari Tachibana transfers into Lilysa's class. Later in the club room, Lilysa poses as a schoolgirl until she once again trips, this time with her panties in Okumura's face. She is thrilled at first until she remembers she is still wearing her real panties. After a while, Mikari confronts Okumura in the club room, who is revealed to be her childhood friend. Using the excuse she was accidentally soaked with water earlier, Mikari starts teasing him. When he remarks she has not changed, she becomes angry, having become a model just to get his attention, leading to another accident where Okumura falls on her. When this does not excite him, she realizes he is still obsessed with Liliel and leaves. Flashbacks show Okumura once saved her from bullies. However, even when she started changing to better resemble Liliel, he continued to prefer Liliel over her, so she spent years focused on her career but remained in love with him. Not giving up, she returns only to catch Okumura with Lilysa cosplaying as Liliel. Mikari is upset until Lilysa bluntly asks her to cosplay together for their next photoshoot.
Mikari impulsively agrees to cosplay to prevent anything happening between Okumura and Lilysa. She insists on cosplaying as Liliel to attract Okumura. However, when Lilysa strips, Mikari changes her mind. Instead, she cosplays as Liliel's enemy, the demoness Miriella. Lilysa creates a Miriella costume but it is obvious that Okumura still prefers Liliel. Desperate for his attention, Mikari poses in a way that highlights her butt, which she happily misinterprets when he blurts out he loves her. Mikari is unprepared for the level of lewdness Lilysa demands in their photos but goes along with it hoping to arouse Okumura. When their costumes become tangled, Okumura ends up seeing both of their breasts and passes out. Mikari realizes if she wants any chance with Okumura, she needs to learn to enjoy manga as much as he does. Mikari reveals that as a professional model the photos of her cannot legally be used in Lilysa's cosrom. Fortunately, Lilysa already has enough photos of herself but editing them will take almost two full days and involves hiding in the school overnight to use the computer. While avoiding security, Okumura inadvertently arouses Lilysa when he covers her mouth.
4
"Time for Our First Event!" Transliteration: "Iza Hatsu Ibento!" (Japanese: いざ初イベント!)
An online role-playing video game game developed by Aiming and Team Caravan, titled Nitengo-jigen no Ririsa Tenshitachi no Sutēji (2.5次元の誘惑 天使たちのステージ), was announced during Jump Festa 2024.[3] It is set to be released for iOS, Android, and PC via DMM Games on September 3, 2024.[50]
Itachi Utada from Famitsu praised the story and characters of the series, particularly enjoying the cosplay elements present.[1]
In the 2020 Next Manga Award, the series ranked fourth in the web manga category.[51] The series has one million copies in circulation between its digital and print releases.[1]