Jigoku ni Ochite yo, Onii-chan (Go to Hell, Onii-chan) by Nejiganameta follows Yūdai, a college student manipulated by his new step-sister, Yuna. The completed four-volume series intensifies in early chapters, focusing on dark, psychological themes as Yuna's provocations deepen Yūdai's obsession. Read more about the series ending at Anime News Network . Jigoku ni Ochite yo, Onii-chan (manga) - Anime News Network