Koi Koi Seven

Tetsuro Tanaka is transferred to Gokoh Academy full of high expectations. However, expectations fade with a bad premonition the moment he steps onto the campus and finds all the students except him are girls. A series of strange events fall upon him. Then, six girls who are called Koi Koi Seven appear as his guardians. Army combat helicopters and anti-tank guns attack Tetsuro for no particular reason as he tries to survive each day in the academy. Surrounded by many girls he gets into trouble every day because he often sees them naked, usually by mistake. In the dorm the same problem continues with the Koi Koi 7 team walking around the house in their underwear. On top of this, Celonious 28 also chases after him all the time because she wants to be with him. As well, Asuka Yayoi feels jealous of him because she loves him and she doesn't want him to hang around with other girls, which is very difficult because he is the only boy in the school and the girls are after him all the time. In general each girl of the Koi Koi 7 team has secret feelings for Tetsuro but they don't show them.

Tetsuro Tanaka (田中 哲朗, Tanaka Tetsurō)

Voiced by: Yūki Tai

Tetsuro becomes the focus of attention for the entire school as he is the only male student. He can't seem to remember the reason why Yayoi always wants to be with him. He also comes to a difficult situation when by mistake he looks at the bra and panties of his roommates. Finally he has feelings for each girl of the Koi Koi Seven's team but he cannot show them for fear of the girls' anger.

Yayoi Asuka (飛鳥 ヤヨイ, Asuka Yayoi)

Voiced by: Saori Gotō

The main heroine of the story. She is part of a group of girls who call themselves the "Koi Koi 7". She had apparently known Tetsuro when they were younger. She claims to have a reason for wanting to be with him all the time. She likes crab bread, a trait which is often exploited by Gokoh Five. She also has the ability to fly and has white angel like wings. However, sometimes she becomes annoying to Tetsuro which led him to ignore her.

Sakuya Kazamatsuri (風祭 サクヤ, Kazamatsuri Sakuya)

Voiced by: Ayako Itō

She is one of Tetsuro's roommates. She is an expert at many firearms and often is seen pulling them out of nowhere (including a bazooka). She's the most talkative and the one that always gets on to Tetsuro. She calls Tetsuro <<kinky>> and tries to express her feelings for him with kinky ideas herself. She always feels comfortable and she doesn't mind walking around naked even if Tetsuro is in front of her. These make her the main sexy character in Tetsuro's imagination. She also has a tendency to smoke and skip classes making others believe she is a delinquent.

Miyabi Tsukuyomi (月読 ミヤビ, Tsukuyomi Miyabi)

Voiced by: Akiko Kawase

She is another roommate of Tetsuro. She can use her hair to form a nearly-impenetrable shield or as an attack weapon. She is very popular in the school even though she finds it annoying. In the anime her background remains a mystery, it only shows her cutting her wrist and blood is flowing out. She believes that Tetsuro is different from the other boys because he always cares for her. In other words, she also has feelings for him. She also has expressed a lack of caring for the lives of the other Koi Koi Seven like grabbing them around the throat with her hair and pulling them along because they are too slow.

Hifumi Inokai (猪飼 ヒフミ, Inokai Hifumi)

Voiced by: Kimiko Koyama

Another one of Tetsuro's roommates. Rivalling Otome for the most flat chest, she is normally calm until provoked. She is the only one who is stronger than Akiwo. She tends the school garden commonly and is generally good friends with Akiwo. She had been very unfair with Tetsuro while she knocked him down because he saw her butt by mistake.

Akiwo Suzuka (鈴鹿 アキヲ, Suzuka Akiwo)

Voiced by: Yūko Gibu

Another one of Tetsuro's roommates. She is very busty and has orange hair. She has "Superman-like" powers like super strength and the ability to fly. But she has mentioned that she has not always been like this. She told Tetsuro that she used to be someone who was very weak and had to be rescued all the time. She explained that she kept telling herself that she should change. She is also a huge fan of "Kinorangers", which is most likely a Parody of the 1980 Super sentai series Denshi Sentai Denjiman since their suits resembles the Denjiman Suits. She was the one to come up with the name Koi Koi 7. She believes that each person can become strong. So she felt proud of Tetsuro when he shot the kinky monster. After that she started to have feelings for him too. She often goes off on her own.

Otome Chono (蝶野 オトメ, Chono Otome)

Voiced by: Yūna Inamura

Another one of Tetsuro's roommates. She has a very calm personality which makes her less aggressive than the other girls in the group. In the anime she has been seen "charging up" using a plug during breakfast, also in the group she is the person who gives the orders and information to the rest of the group after analyzing the data. Otome's comments often include words like "incomprehensible," making her "robot-like." Later in the anime she is revealed to be a robot. Even though she is a robot, she still dreams and has feelings like the feelings she has for Tetsuro, even though she cannot even comprehend those feelings herself. However Tetsuro made her very happy saying to her that she is an absolutely normal girl. She wears large ribbons in her hair.

Kozoma

(people who joined the school in their senior year) This group includes all six girls in the Koi Koi 7, plus Tetsuro.

Yayoi Asuka (Celonius 28) (アスカヤヨイ (セロニアス28号))

Voiced by: Nana Mizuki

A mysterious girl with an eyepatch. She believes that she is the real Yayoi that Tetsuro met in his past, due to being a part of a nationwide security system designed to watch and protect Yayoi and Tetsuro. She was then rebuilt as a gynoid and through the events of the story was mostly destroyed. With all her memory erased she is rebuilt as a robot but in a much younger form (much like Otome as she is in her spare body), now called Gantai she has the mentality of a child. Early on she thought that nobody loved her, but Tetsuro changes her mind showing her that everyone loves her. After that she tries to take care of Tetsuro and make him happy. Voiced by Nana Mizuki.

Orie Kano (花皇 ヲリエ, Kano Orie)

Voiced by: Akiko Kimura

The teacher, who also lives in the student dorm with Tetsuro and the Koi Koi 7 girls. She had feelings for Tetsuro's father before he managed to open the heaven's door. She is also a mechanic.

Kongō Higashikazuno (東和野 金剛, Higashikazuno Kongō)

Voiced by: Norio Wakamoto

The mysterious headmaster who has hidden knowledge about Tetsuro. His mission is to stop Tetsuro's father before he makes something bad.

Miya Higashikazuno (東和野 ミヤ, Higashikazuno Miya)

Voiced by: Tsubasa Otomiya

Grandchild of the school's founder. She is officious and self-important. She and her gang, the Gokoh Five, are constantly after Tetsuro.

Hekusokazura no Kimi (屁糞蔓の君)

Voiced by: Saki Nakajima

Second in command at the Gokoh Five. She also has a secret personality as a spy in the school in order to watch Tetsuro's father movements.

Kazuko Iidabashi (飯田橋 和子, Iidabashi Kazuko)

Voiced by: Rumi Abe

A member of the Gokoh Five. Very nervous.

Chuko Asakusabashi (浅草橋 中子, Asakusabashi Chūko)

Voiced by: Kana Masaki

A member of the Gokoh Five.

Yoko Suidobashi (水道橋 洋子, Suidobashi Yōko)

Voiced by: Yoshimi Ninomiya

A member of the Gokoh Five. More logical and sensitive.

Isuzu Yamada (山田 イスズ, Yamada Isuzu)

Voiced by: Miyu Matsuki

A student who is head over heels in love with Satou. She wrote a lesbian book.

Subaru Satou (佐藤 スバル, Satō Subaru)

Voiced by: Miho Miyagawa

Another student who is head over heels in love with Yamada. At first she didn't want to have a relationship with Yamada but in the end she loves her.

Tetsuro's Father is a mysterious man who is furious because the council turned down his research. He tries to get revenge by robots such as Celonious 28.

• Official Homepage (in Japanese) (Archived)
• Enoki Films (Archived)
• Koi Koi Seven (manga) at Anime News Network's encyclopedia