Kirawaremono no Ore wa Yarinaoshi no Sekai de Giteitachi ni Goma wo Suru

Charles, the marquis’ son, lost his mother and coldly treated his father’s new wife and his younger stepbrothers, Jade and Lien. This leads to his tragic and untimely death in a chain of misfortune. However, when he awakens after his supposed death, he finds himself back in the past, before meeting his stepbrothers. Determined not to follow the same miserable path, he decides to cherish them this time. As a result, his stepbrothers become deeply devoted to him—!? (Source: AlphaPolis, translated)