The Visual NovelEdit
- Main article: Endings
Sekai has 5 good endings, all of which ends with her and Makoto overcoming all obstacles to be together. In 4 of the bad endings, she gets killed by Kotonoha in one, kills Makoto after getting impregnated (either by him or Taisuke), kills Kotonoha (after getting impregnated by Taisuke), or break up with Makoto after Kotonoha commits suicide, being remined of it everytime they see each other. In the second ending mentioned she gives birth to a boy and leaves it in the care of her mother Youko. In the latter ending in the LxH version of the game Sekai's married but to be divorced soon. In all 7 of Kotonoha's endings and Otome's single ending she ends up alone without any malicious intent, always breaking up with Taisuke. In Hikari's 2 endings she's still in a relationship with Makoto while he cheats on her with Hikari and a multitude of girls, or he's in a secret relationship with Hikari and is later seen crying comically after Hikari's given birth to their baby, presumably sad rather than having any malicious intent. In the 2 harem endings she ends up in a polygamous relationship with Kotonoha and Makoto and gets pregnant, or moves to Paris and futilely has a failing long distance relationship with Makoto.
Note that the japanese wikipedia classifies Setsuna's Feelings to be a Setsuna ending, even though Makoto ends up with Sekai.
In the anime Sekai claims that she is pregnant, but when she confronts Makoto about this he automatically rejects her. Sekai is distraught by this but believes that Makoto is simply just in shock and carries on dating him, unknowingly Makoto has once again gone back to Kotonoha. When Sekai makes Makoto dinner, Makoto tells her to leave whilst on the phone, revealing that he is with Kotonoha. Sekai trashes the place and leaves. Sekai and Makoto then talk about what to do with the baby and Makoto hints to Sekai to what she believes to be an abortion. Sekai then leaves before texting Makoto "I'm Sorry" before violently stabbing him to death. Sekai realising what she has done, runs out of the room in distress. Afterwards she gets a message from "Makoto" asking her to go to the school roof where she meets up with Kotonoha. Kotonoha shows Sekai Makoto's severed head before killing Sekai herself and cutting her open to see if Sekai really was pregnant. Kotonoha claims she wasn't pregnant and only pretended to grab Makoto's attention.
The manga has a completely different ending as Sekai and Makoto end up together. Kotonoha accidently wounds Makoto after trying to kill Sekai in a fit of jealous rage. In the hospital, Makoto is with Sekai telling her that he is going to apologize to Kotonoha. Sekai then gets a phone call from Kokoro (Kotonoha's younger sister) telling Makoto that her sister is on the floor covered in blood. Makoto is horrified before Sekai reveals that she has indeed killed Kotonoha due to her being too dangerous.
Depending on which route you take, Yuuki will try to end the affair between Sekai and Makoto 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.