Keiichi Katakura (片倉 恵一 Katakura Keiichi?) is one of the four male protagonists of the Nijiiro Days series. He is the younger brother of Yuji Katakura, a teacher at Seiryou High School. On the surface, Keiichi is seen to be a cheerful, kind and outgoing young man, but he is actually a sadist who enjoys whipping people. He is nicknamed Kei-chan (けいちゃん?).


Keiichi is a tall young man of average build with a lithe frame. He is considered very attractive and is bubbly-looking in nature. He has short, slightly messy, dark-brown hair which is neck-length. He sports his bangs in a middle part. His eyes resemble the color of a chestnut. He always carries a whip on him, ready to pop it out at any given moment. Keiichi is often depicted in his school uniform, and casual clothing outside of school.


Keiichi is a really good person; he is athletic, cheerful and kind, but also loyal and caring towards his friends. However, he is actually a sadist, and he always carries around a whip, and he also likes to whip people. But he is always straightforward about it from the beginning. He can be a bit insecure about his friends and his romantic life but always manages to snap out it since he knows his friends care for him. Most girls who confesses to him often mistake him to be a wholehearted being with a kind personality but beneath the amiable attitude, he is actually a sadist. He usually smiles and talks about his kinks in a natural, nonchalant manner, which causes his admirers to take back their confessions.

He always has a smile and hides his sadistic side from his friends because he doesn't want to trouble them, but he is comfortable to show his friends his sadistic side sometimes. He sometimes shows his sadistic side to other people, often to girls confessing to him (since they don't about know his real personality), including Nozomi. However, Nozomi's case was a little different. She is also probably into some BDSM.


It is unknown how Keiichi got his sadistic side, but it is possible he was born with it. However, it can also be possible that he got influenced by his brother, who is also a sadist.

He prefers older woman since they are more mature and can tolerate his sadistic side more. He has only dated older women in the past, but they eventually broke up.


Nozomi MatsunagaEdit

Keiichi once helped Nozomi at the beach when she had injured her foot. After this, Nozomi took a interest in him and when she realized that Mattsun and Keiichi were friends she wanted to thank and talk to him immediately. However, Keiichi didn't remember the girl he helped until Mattsun said that is was Nozomi. So Nozomi joins the group, and develops a deep crush on Keiichi, which she doesn't even try to hide. However, Keiichi wasn't interested in Nozomi at all, only viewing her as a friend. However, after showing that he has a split personality, she wasn't driven away which quite interested Keiichi. She instead said that she wants to see all of his "faces", and when she confessed that she is serious about being in love with him (even though Keiichi prefers older woman), Keiichi accepted her love and told Nozomi to "catch" him if she can. (Even though he doesn't like when girls chase after him like that, but this shows he was interested in Nozomi).

However, he is still isn't sure if he can be together with her because of the hobby he's into so when they meet later, Keiichi coldly "rejects" her, saying that nothing will happen between them, even though he says that she is very beautiful and strongheaded. However, Nozomi didn't feel sad nor shed a single tear, she just fell even more in love with him. When they meet again after this event, Keiichi saw Nozomi with another boy, but she explained that they were only friends (though that boy confessed to Nozomi), and that Keiichi will be the only one for her. He then tells her that she has to reject him "properly", or else he will "punish" her. However, since he stated that she did her best she will get a reward instead.

This shows that Keiichi might have more interest in Nozomi than before. He even told Mattsun to "expect a lot of begging". It has also been hinted that Nozomi has an "M" side, most likely brought out by Keiichi.

Natsuki HashibaEdit

Keiichi considers Natsuki as a close friend and also calls him Nacchan. Keiichi is a very grateful towards him because Natsuki was the one who brought Keiichi, him, Mattsun and Tsuyoshi together when Mattsun and Keiichi were fighting in the past. They also tend to play sports a lot together. While Keiichi is very friendly with him, he likes to use new tricks on him with his whip, which horrifies Natsuki. However despite this, Natsuki doesn't mind his sadistic personality and want him to stay the way he is.

Tomoya MatsunagaEdit

Tomoya or Mattsun as they call him is on good terms with Keiichi, and Keiichi also considers Mattsun as a good friend. However, after finding out that Nozomi is in love with Keiichi, Mattsun is seen scolding Keiichi very often and getting irritated with him when he is alone with Nozomi which Keiichi understands although he gets annoyed by this at times. Despite this, they are good friends.

Tsuyoshi NaoeEdit

Tsuyoshi and Keiichi are also good friends. Not much interaction has shown between the two but Tsuyoshi doesn't mind his sadistic side and Keiichi sometimes copies Tsuyoshi's homework. Tsuyoshi has also given advice on what to do about Keiichi's situations that involve Nozomi.


  • Keiichi's favorite food is hamburgers.
  • His least favorite food is Milt (Soft roe).


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Male Characters Natsuki HashibaTomoya MatsunagaKeiichi KatakuraTsuyoshi NaoeImagawaKakeiMasaomi TsutsuiShinsuke NezuTaizo SanadaUsamiWataru MochizukiYuji Katakura
Female characters Anna KobayakawaAya OhnoIshidaKaori ChibaMari TsutsuiNabeNozomi MatsunagaRinaSatomiYukiko AsaiYuri Kobayashi