Kaisei no Caricature

A student at Private Academy Clanmine, Mitsuki Shirogane, repeatedly dreams of a brother who sacrifices himself for him, despite having no such sibling in reality. The school enforces a strict hierarchy based on uniforms, includes a mysterious older brother figure, and features an impenetrable clock tower that no one has ever entered. As the truth behind these strange elements is uncovered, a significant journey begins.