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Sekai Saionji

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Sekai Saionji
Saionji Sekai
Born 7 December
Blood-Type B
Gender Female
Height 155cm
B.W.H 84-62-86
Hair Brown
Eyes Dark blue
Affiliation Sakakino School Class 1-3

Radish Restaurant

Occupation High School Student
Family and Relatives Shun Hazama (father/maternal half-uncle)

Youko Saionji (mother/paternal half-aunt)
Tomaru Sawagoe (paternal and maternal grandfather)
Hatsuka Hazama (paternal grandmother)
Moegi Inou (maternal grandmother)
Mai Kiyoura (maternal first cousin/half-aunt(Tomaru))
Taisuke Sawanaga (maternal first cousin/potential lover)
Setsuna Kiyoura (paternal half-sister/maternal cousin-niece)
Hanon Nijou (paternal half-sister/single half first cousin(Tomaru))
Kazuha Nijou (paternal half-sister/single half first cousin(Tomaru))
Futaba Nijou (paternal half-sister/single half first cousin(Tomaru))
Inori Ashikaga (paternal half-sister)
Roka Kitsuregawa (paternal half-sister)
Kagura Inou (maternal aunt/paternal half-aunt)
Ayumu Inou (maternal uncle/paternal half-uncle)
Makoto Itou (double half-uncle(Shun+Youko)/lover)

Seiyuu Shiho Kawaragi
(credited as "Kaname Yuzuki" in the games)

Sekai Saionji (西園寺 世界 Saionji Sekai) is one of the two main heroines of School Days along with Kotonoha and appear as a secondary character in Summer/Shiny Days and Cross Days. In a way she initiates all the events by setting up Makoto with Kotonoha and indirectly causes all the good, or bad events to happen.

Sekai is a seemingly cheerful girl who pries into Makoto's affairs and finds out about his  crush and puts them together, but regrets doing it immediately after because she's been in love with Makoto for a long time. Because she always puts Makoto and Kotonoha together, for her relationship with Makoto to succeed his and Kotonoha's relationship must end, which can serve as the catalyst for all the bad things that happens.

Her friends include Setsuna Kiyoura, Hikari Kuroda and Nanami Kanroji, with the first being her best friend from birth. She usually eats lunch with them during school but after she starts having lunch with Makoto they can get the wrong idea about her and Makoto.

She lives with her single mother Youko, who gave birth to her when she was younger than Sekai's current age.

Unlike Kotonoha she's not prone to committing violent actions easily, and will only do it if she's abandoned and pregnant.


Sekai has an average build with an average height with an average bust but on the larger size (as commented by Yuuki Ashikaga). Still, she's described as one of the cuter girls in class by Makoto. She has medium length deep brown hair that curl slighty from behind as well as one "idiot hair" curls upward. She's normally seen with her school uniform but her casual clothes usually consist of a white shirt with a pink jacket and a dark blue skirt. Later she buys a pink coat she has had her eye on for a while after she saves up enough. If she's depressed Makoto expresses concern for her saying she's gotten skinnier and sickly looking.

Before going to the pool she can go shopping for a swimsuit with Nanami and she complains how swimsuits go out of style every year and girls have to buy a new one every year, and she's seen in a different swimsuit almost a year later.


Sad sekai

An emotional side few know

Sekai is initially seen as a cheerful girl who cares deeply for her friends and seemingly helps Makoto out with Kotonoha only for fun. She often berates Makoto every time he does something that he shouldn't to a girl. But it's revealed she's very emotional and can spend days crying in her room. She is also unwilling to reveal to Kotonoha that Makoto and her are dating but when she sees Kotonoha alone at a reception desk she feels guilty at taking Makoto away from her. Above all she's loved Makoto for a long time and can go into depression when he starts dating Kotonoha, something that can be worsened if Setsuna leaves for Paris.

The Visual NovelEdit

Her VN version is the most caring of all her adaptations. She's capable of distancing herself from Makoto and Kotonoha, and only gets together with him because Makoto pursues her. She's very afraid of losing Makoto and can be devastated if Youko is chosen to go to Paris.

She also believes in the cell phone charm and is seen doing it with Makoto. She's also mentioned to have sharp perception by Makoto and is, to a slight extent demonstrated by her ability to give valuable advice to both Makoto and Kotonoha when their relationship gets rocky but her ability fails her when she herself is involved.

At the height of her depression (Makoto dating Kotonoha, Setsuna gone to Paris and her dating Taisuke, a guy she doesn't even like) she mentions to Kotonoha that she wants a dad, but her own dad, as described by her mother is a "hopeless good-for-nothing".

She genuinely doesn't want anyone to get hurt because of her, though unwilling to go through with it she pressures Makoto into telling Kotonoha of their relationship, or despite her crush on Makoto not getting in his and Kotonoha's relationship, and being genuinely shocked and apologetic that her friends have been bullying Kotonoha behind her back. Her only instances of physically harming other people involves her getting pregnant and being subjected to depression and abandonment.


In the Anime she's slightly more selfish than her visual novel counterpart, for example it's implied she had an ulterior motive to get together with Makoto anyway, ignoring Kotonoha while in the VN she only does so if Makoto genuinely proclaims his love. She also concerned less with other's well being, such as Kotonoha being cheated on, and further she doesn't break off things when Makoto starts to cheat on her.


Her Manga version is arguably the most despicible, as she cares little for the consequences of her actions and gets together with Makoto behind Kotonoha's back by her own actions. Though she still accepts that Makoto loves Kotonoha more than her late in the Manga she kills Kotonoha after Kotonoha tries to kill Makoto, while mocking her for calling out for Makoto.

School DaysEdit

The Visual Novel

Sekai initially learns of Makoto when he helps Setsuna when she's being bullied and decides to do some research on him for Setsuna but falls in love with him herself. She has no idea how to approach him and he himself pays attention to nothing, let alone her. A surprise seating arrangement occurs and when she learns that Setsuna was sat next to Makoto she begs her to switch seats, as it may be the only chance for her to get close to him.

Thus she tries to get to know him but immediately learns of his crush on Kotonoha, and decides to help him make Kotonoha his girlfriend, presumably because it's her only excuse to stay close to him. Together they have lunch every day and learn about Kotonoha and she inevitably succeeds in putting them together. Before Makoto goes on his first date with Kotonoha she kisses him, claiming it's only a tease yet she's obviously distraught over succeeding. From then on depending how the story goes she can end up with Makoto, end up simply depressed, get killed, or go insane and kill Kotonoha or Makoto. See this for more details.


Sekai's role is largely the same, however, the series focuses more on Makoto's affair with Sekai, and the other girls in the series. Sekai is a good friend of Makoto at the start of the series and wants to help him get involved with Kotohona. However she develops feelings for him and allows Makoto to practice on her body because Kotohona is sensitive to touches. While she does feel guilty for getting involved with Makoto, even to the point of trying to ignore him for Kotohona's sake, Makoto manages to convince Sekai that he loves her and not Kotohona. As the series progress however she discovers that Makoto is sleeping around with other girls and allows it to happen. She discovers that she is pregnant and is driven over the edge when Makoto leaves her for Kotohona and advises her to get an abortion.


Sekai's role is almost the same as in the anime. The big difference is that she is far more forward about her feelings for Makoto, but ultimately accepts Makoto loving Kotohona more then her. She even shows a willingness to remain friends with Makoto and accepting being dumped.

In the end however Kotonoha goes insane and stabs Makoto while attempting to murder Sekai, but he survives. Sekai seems to go Yandere at that moment but rather takes Makoto to the hospital. However a week later she kills Kotonoha, saying she's far too insane and dangerous. She also makes some remarks that could be construed as insane, such as saying only she'll be the one who brings Makoto happiness and she wants to start over with a clean slate.

Summer Days / Shiny DaysEdit

Sekai's role is largely reduced, due to have gotten sick with the mumps. She is mostly unseen except for at the beginning of the game, when she asks Setsuna to take her place at work, and a few other scenes.

The classic "Love Triangle" between Makoto, Kotonoha, and herself doesn't exist. But later in the story, Sekai and Makoto can become lovers.

Cross DaysEdit

The Visual Novel

Sekai's role is rather small and reduced but for most story lines she is involved with Makoto.

Depending on which route you take, Yuuki will try to end the affair between Sekai and Mokoto but cannot convince either of them. In one route Yuuki might not only attempt to try to kill Sekai to stop the affair but he also almost attempts to molest her but Sekai is rescued by Setsuna.


In the Manga version Yuuki also tries to convince Sekai to stop stealing Makoto away from Kotohona but is told that it's none of his business. In the end it's revealed that Sekai and Kotohona were both in a three-way relationship with Makoto.

Gallery Edit


See Sekai Saionji/endings


  • Her given name Sekai means "the world".
  • The origin of her full name is an allusion to Saionji Kinmochi (西園寺 公望), a statesman and three-time Prime Minister of Japan, and they share same birthday.
  • Sekai 5 endings which is fewer than Kotonoha but they're all unique unlike Kotonoha who has 4 unique endings.
  • The Japanese wikipedia classifies Setsuna's Feelings to be a Setsuna ending, even though Makoto ends up with Sekai. If one were to do that, all of Sekai's ending ends in a hug.
  • In the anime, Kotonoha says that Sekai was lying about her pregnancy due to her seeing nothing in Sekai's corpse. She could be wrong because a fetus would not have had enough time to develop long enough to be seen until weeks after being conceived. In the visual novel however playing along roughly similiar to the anime ("training" with her) she can get pregnant.
  • Sekai used to heavily believe in the phone wallpaper rumour and if she ends up with Makoto she can assure it works to Hikari.
  • According to the official family tree Makoto has children with Sekai and Setsuna but the official continuity is still unknown, see this.
  • She can become a mother in To My Child and Two Lovers endings and in the Shiny Days ending Paris of the Four People with Makoto's children or in the School Days LxH exclusive ending End of the Folly with Taisuke's son.


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