Re:ZERO - Starting Life in Another World: Chapter 3: Truth of Zero - Volume 5 | Daichi Matsuse, Tappei Nagatsuki

After a near-fatal encounter with the White Whale, Subaru awakens in Roswaal Manor distraught. As the very memory of Rem fades from the world, Subaru attempts to fight through the witch's curse to reveal his "Return by Death" ability in the hopes of conveying the gravity of the danger before Emilia. Subaru believes he is ready to suffer the consequences, but the price for telling the truth is crueler than he could have imagined...