School Days

While having dinner with Kotonoha at a restaurant, Makoto receives a phone call from Sekai who's waiting at his home. Before hanging up he tells Sekai that she ruined his life by getting pregnant and announcing it to the class. Sekai texts him an apology before heading home, but not before she destroys the dinner she had planned to share with Makoto. On the train ride home she catches sight of Kotonoha and Makoto together which causes her to head back to Makoto's. After a brief and tense confrontation with Kotonoha, Sekai leaves in a state of agony after witnessing Makoto and Kotonoha deep kiss in front of her. As she is walking home, it is revealed in a flashback that Sekai knew all along of Setsuna's feelings towards Makoto even to the point of supporting Setsuna to confess. It is only then that Sekai realizes what she has done to Setsuna. The situation worsens overnight when Makoto suggests to Sekai over text that she have an abortion. Overcome by emotion, Sekai stabs Makoto repeatively the next day while at his apartment. He briefly whispers Sekai's name, and promptly dies from the various stab wounds. After a few moments of staring at Makoto's body beneath her, Sekai becomes shocked by her actions and runs away in a panic. Shortly afterwards, Kotonoha arrives at Makoto's home to find him dead. Sekai, who was hiding in her room, receives a cryptic text from Makoto to meet "him" at the school's rooftop. She proceeds there cautiously, carrying the knife she killed Makoto within her jacket. After arriving she is confronted by Kotonoha, who accuses Sekai of lying about being pregnant. Sekai denies lying, and Kotonoha tells Sekai to look inside the gym bag lying on the bench, which contains Makoto's severed head. At that moment, Kotonoha unravels a bloody dozuki and kills Sekai. In a state of insanity she cuts open the womb of Sekai's lifeless body and upon seeing nothing, concludes that Sekai was lying. On her family's boat drifting off in the distant ocean, Kotonoha is last seen holding Makoto's head in her arms saying that now they can finally be together. Time passes by and life at the school returns to normal.