Re:ZERO -Starting Life in Another World-, Chapter 3: Truth of Zero, Vol. 3 (manga) — Tappei Nagatsuki

Change the World, One Life at a Time
Whether in a dinner with royal candidate Crusch Karsten or another sparring session with master swordsman Wilhelm, Subaru is often reminded that he has much to learn. However, the opportunity for reflection is cut short when Rem senses peril at Roswaal Manor. Never one to sit still, Subaru races back to the mansion, but what awaits him is not for the faint of heart...