Kokuhaku Jikkō Iinkai: Ren'ai Series

Natsuki Enomoto (榎本 夏樹, Enomoto Natsuki)

Voiced by: Haruka Tomatsu[6]

A boisterous third year student who is friendly to everyone. She is in love with her childhood friend Yu, but she fears that if he rejects her confession, their friendship will be ruined. To save face, she lies to him by stating that he is her practice confession partner. Her main songs are "Kokuhaku Yokō Renshū" (告白予行練習), "Byōmei Koi Wazurai" (病名恋ワズライ), "Tokyo Summer Session" (東京サマーセッション), "Tokyo Winter Session" (東京ウインターセッション), "Tokyo Autumn Session" (東京オータムセッション), and "Destiny."

Yu Setoguchi (瀬戸口 優, Setoguchi Yū)

Voiced by: Hiroshi Kamiya[6]

Natsuki's childhood friend and the president of the Movie Research Club. He is secretly in love with Natsuki, but unsure if the feeling is mutual. His main songs are "Kokuhaku Yokō Renshū ~Another Story~" (告白予行練習〜another story〜), "Terekakushi Shinshuki" (テレカクシ思春期), "Tokyo Summer Session" (東京サマーセッション), "Tokyo Winter Session" (東京ウインターセッション), "Tokyo Autumn Session" (東京オータムセッション), and "Terekakushi Kinenbi" (テレカクシ思春期).

Sota Mochizuki (望月 蒼太, Mochizuki Sōta)

Voiced by: Yūki Kaji[6]

The vice president of the Movie Research Club and nicknamed "Mochita." He falls in love with Akari and gets easily jealous of other guys approaching her. His main songs are "Yakimochi no Kotae" (ヤキモチの答え), "Tokyo Summer Session" (東京サマーセッション), "Tokyo Winter Session" (東京ウインターセッション), "Tokyo Autumn Session" (東京オータムセッション), and "Boku ga Namae o Yobu Hi" (僕が名前を呼ぶ日).

Akari Hayasaka (早坂 あかり, Hayasaka Akari)

Voiced by: Kana Asumi[6]

The president of the Art Club. A beautiful and nice, yet sort of clumsy girl, nobody knows what she is actually thinking. Even though she admires the concept of love, she has never experienced falling in love herself. Her main songs are "Yakimochi no Kotae ~Another Story~ (ヤキモチの答え〜another story〜), "Tokyo Summer Session" (東京サマーセッション), "Tokyo Winter Session" (東京ウインターセッション), "Tokyo Autumn Session" (東京オータムセッション), and "Watashi ga Koi o Shiru Hi" (私が恋を知る日).

Miou Aida (合田 美桜, Aida Miou)

Voiced by: Aki Toyosaki[6]

The vice president of the Art Club. A gentle, shy, and discreet girl. She is not good at talking with boys, but she gets along with Haruki. As a result of their closeness, they are rumored to be dating. They deny the rumors while struggling to confess their feelings to each other. Mio's main songs are "Hatsukoi no Ehon" (初恋の絵本), "Mirai-zu" (未来図), "Tokyo Summer Session" (東京サマーセッション), "Tokyo Winter Session" (東京ウインターセッション), "Tokyo Autumn Session" (東京オータムセッション), and "Ippun'ichibyō Kimi to Boku no" (一分一秒君と僕の).

Haruki Serizawa (芹沢 春輝, Serizawa Haruki)

Voiced by: Kenichi Suzumura,[6] Koinu (childhood)

A member of the Movie Research Club. His blond hair and sharp eyes lead others to believe he is a bad student. He falls in love with Miou and though they act like a couple, they are unable to confess their feelings to each other. His main songs are Hatsukoi no Ehon ~another story~" (初恋の絵本〜another story〜), "Inokori-sensei" (イノコリ先生), "Sayonara Ryo-Kataomoi" (さよなら両片想), "Tokyo Summer Session" (東京サマーセッション), "Tokyo Winter Session" (東京ウインターセッション), "Tokyo Autumn Session" (東京オータムセッション), and "Ippun'ichibyō Kimi to Boku no" (一分一秒君と僕の).

Koyuki Ayase (綾瀬 恋雪, Ayase Koyuki)

Voiced by: Tsubasa Yonaga[6]

A member of the Horticulture Club. A boy with long hair and glasses who changed his appearance during his third year in high school after being teased for his feminine looks. Natsuki never teased him and because of this, he is in love with her, but he is aware of Natsuki and Yu's mutual feelings toward each other. His main songs are "Kokuhaku Rival Sengen" (告白ライバル宣言) and "Senpai." (センパイ).

Sena Narumi (成海 聖奈, Narumi Sena)

Voiced by: Sora Amamiya[6]

A girl who works as a model outside of school. Unbeknown to Midori, she has noticed him too and wants to talk to him. Her main songs are "Kin'yōbi no Ohayō ~Another Story~" (金曜日のおはよう〜another story〜), "Kawaiku Naritai" (可愛くなりたい), "Nichiyōbi no Himitsu" (日曜日の秘密), and "Watashi no Tenshi" (ワタシノテンシ), which is about the relationship to her younger sister Mona.

Midori Hamanaka (濱中 翠, Hamanaka Midori)

Voiced by: Gero[7]

Haruki's best friend who moved from Kansai before entering high school. He speaks in a Kansai dialect. He recognized Sena on his commute by train to school and has wanted to talk to her, but cannot muster the courage to do so. His main songs are "Kin'yōbi no Ohayō" (金曜日のおはよう) and "Nichiyōbi no Himitsu" (日曜日の秘密).

Hina Setoguchi (瀬戸口 雛, Setoguchi Hina)

Voiced by: Momo Asakura[7]

Yu's younger sister by two years. She styles her pink hair in twin pigtails. During her first year in middle school, she met Koyuki and despite a disastrous first encounter full of misunderstandings, the two became friends and she fell in love with him. She wants to confess her feelings, but she knows that Koyuki is in love with someone else. She later develops feelings for Kotaro and begins dating him in her twenties. Her main songs are "Ima Suki ni Naru" (今好きになる), "Sankaku Jealousy ~Another Story" (三角ジェラシー〜another story〜), "Senpai." (センパイ。), "Daikirai na Hazudatta." (大嫌いなはずだった。), and "Erande Kurete Arigatou." (選んでくれてありがとう。).

Kotaro Enomoto (榎本 虎太朗, Enomoto Kotarō)

Voiced by: Natsuki Hanae[7]

Natsuki's younger brother by two years. He has trouble being honest and his words sometimes end up hurting people. He is in love with Hina, but after he learns that Hina loves Koyuki, he tries to help her with her confession. He and Hina become a couple in their twenties. His main songs are "Sankaku Jealousy" (三角ジェラシー), "Ima Suki ni Naru ~Triangle Story~" (今好きになる〜triangle story〜), "Daikirai na Hazudatta." (大嫌いなはずだった。), and "Erande Kurete Arigatou." (選んでくれてありがとう。).

Arisa Takamizawa (高見沢 アリサ, Takamizawa Arisa)

Voiced by: Nao Tōyama[7]

A girl with short bangs and a twin-tail hairstyle. In middle school, she helped her classmate from being bullied, but ended up getting bullied herself. She admires Sena and wears her hair the same way Sena does. She disapproves of Ken's womanizing behavior and after criticizing his behavior, he takes an interest in her. She starts to like him, but his flirty ways and many girlfriends discourage her from acting on her feelings. Her main songs are "Heart no Shuchō" (ハートの主張) and "Ijiwaru na Deai" (イジワルな出会い).

Ken Shibasaki (柴崎 健, Shibasaki Ken)

Voiced by: Yoshimasa Hosoya[7]

Kotaro's friend since middle school. He is nicknamed "Shibaken." He has a reputation for being a playboy, but he was actually a shy and sensitive person in elementary school. After Arisa scolds him for his behavior, he begins to rethink himself, realizing that his casual relationships are not serious. He breaks up with his girlfriends, intending to have Arisa as his only focus. His main song is "Ijiwaru na Deai" (イジワルな出会い).

Kodai Yamamoto (山本 幸大, Yamamoto Kōdai)

Voiced by: Yoshitsugu Matsuoka[7]

Kotaro and Ken's best friend who loves to read books and seems to be very observant of other people. He secretly has a crush on Natsuki. His main song is "Lens Goshi no Keshiki" (レンズ越しの景色).

Hiyori Suzumi (涼海 ひより, Suzumi Hiyori)

Voiced by: Inori Minase

A classmate of the idol group LIPxLIP. Her main song is "Non Fantasy" (ノンファンタジー) and "Heroine Ikusei Keikaku" (ヒロイン育成計画)

Yujiro Someya (染谷 勇次郎, Someya Yūjirō)

Voiced by: Kōki Uchiyama

A member of the idol group LIPxLIP. Despite the group's popularity, he does not get along with Aizo. He performs many songs including "Romeo" (ロメオ) and "Non Fantasy" (ノンファンタジー). His main solo song is "Seika" (青華).

Aizo Shibasaki (柴崎 愛蔵, Shibasaki Aizō)

Voiced by: Nobunaga Shimazaki

Ken Shibasaki's younger brother, a member of the idol group LIPxLIP. Despite the group's popularity, he does not get along with Yujiro. He performs many songs including "Romeo" (ロメオ) and "Non Fantasy" (ノンファンタジー). His main solo song is "YELLOW".

Mona Narumi (成海 萌奈, Narumi Mona)

Voiced by: Shiina Natsukawa

An up-and-coming, hard-working solo idol, using the stage name "mona". She is a rival of the idol group LIPxLIP. She gets supported by her older sister, Sena Narumi, to whom she looks up to. Her main songs are "Watashi, Idol Sengen" (私、アイドル宣言), "Fansa" (ファンサ), and "No.1".

Saku Akechi (明智 咲, Akechi Saku)

Voiced by: Hikaru Midorikawa

A teacher at Sakuragaoka Academy and the advisor of Movie Research Club. He was Chiaki's best friend and has known Haruki since childhood. Since Chiaki's death, his relationship with Haruki has been strained. His main subject is literature and he always wears a white coat so his clothes do not get dirty. His main song is "Inokori Sensei" (イノコリ先生).

Chiaki Serizawa (芹沢 千秋, Serizawa Chiaki)

Voiced by: Ryohei Kimura

Haruki's late older brother and Saku's best friend. He died due to his illness. He saved Mio from drowning when she was younger. He appeared in "Inokori-sensei" (イノコリ先生). His main song is "Senkou Hanabi" (線香花火).

Ryō Ōgino (扇野 りょう, Ōgino Ryō)

Voiced by: Marina Inoue

A sports-type girl. While there's no infomaton on her, she seems to be related in anyway to Koyuki Ayase.

The first film titled Zutto Mae Kara Suki Deshita opened in Japan on April 23, 2016. The film is based on the songs "Kokuhaku Yokō Renshū," "Hatsukoi no Ehon," and "Yakimochi no Kotae," which tell the third year students' love stories.[9] The opening theme performed by CHiCO is titled "Koi Iro Sake" (恋色に咲け) and the ending theme performed by Sphere is titled "Ippun'ichibyō Kimi to Boku no."[10]

The second film Suki ni Naru Sono Shunkan o opened in Japan on December 17, 2016. The film is based on the songs "Ima Suki ni naru" and "Sankaku Jealousy," which tell the love story of Hina Setoguchi, Kotaro Enomoto, and Koyuki Ayase. The opening sung by TrySail is titled "Senpai." and the ending song titled "Daikirai na Hazudatta." is performed by Sayuringo Gundan + Manatsu-san Respect Gundan from Nogizaka46.[11]

Both films are produced by Qualia Animation with direction and scripts respectively by Tetsuya Yanagisawa and Yoshimi Narita. Maki Fujii serves as character designer adapting Yamako's art and as chief animation director. HoneyWorks serves as a music producer.[7]

In 2020, HoneyWorks announced a new anime film with LIPxLIP as main characters titled Kono Sekai no Tanoshimikata: Secret Film. The film is a part of HoneyWorks' 10th anniversary project and the animation production is done by CLAP.[5]

In March 2018, an anime television special was announced on the official HoneyWorks Twitter account.[4] The series titled Our love has always been 10 centimeters apart (いつだって僕らの恋は10センチだった。, Itsu Datte Bokura no Koi wa 10 Senchi Datta.) was broadcast for six weeks starting on November 24, 2017 on Tokyo MX and BS11. The story focuses on Mio Aida and Haruki Serizawa with new elements added to the plot; the series adapts the songs "Hatsukoi Ehon" and "Ippun'ichibyō Kimi to Boku." The animation is produced by Lay-duce while Takurō Tsukada serves as the director and Hitoshi Nanba serves as the chief director.[12] The group LIPxLIP, composed of Kōki Uchiyama and Nobunaga Shimzaki, performs the opening theme "Non Fantasy" (ノンファンタジー). The main cast members as their characters (Haruka Tomatsu as Natsuki Enomoto, Hiroshi Kamiya as Yu Setoguchi, Yūki Kaji as Sota Mochizuki, Kana Asumi as Akari Hayasaka, Kenichi Suzumura as Haruki Serizawa, and Aki Toyosaki as Mio Aida) perform the ending theme "Tokyo Winter Session" (東京ウインターセッション).[13] The final episode features a song performed by Aki Toyosaki under her character name Mio Aida titled "Re: Hatsukoi no Ehon" (Re:初恋の絵本). Aniplex of America has licensed the series for a North American release. Crunchyroll holds the rights for online streaming. On August 24th, Funimation announced they would add the show to their catalog the next day.[14]

A light novel series adaptation is published by Kadokawa's Kadokawa Beans Bunko. All volumes are written by Tōko Fujitani with illustrations by Yamako.

A smartphone app game titled HoneyWorks Premium Live based on HoneyWorks' songs is in development.[4]