Energy Saving Knight's Guide to Lying Down in Another World

Traveling through a different world, Tony is bound to a strange system - core creed: energy conservation! Absolutely energy saving! He just wants to use the lowest "energy consumption" to survive. But fate gave him a hot potato: he became the knight attendant of the mysterious "Border Marquis" Chiago who was seriously injured and endangered. This boss with silver hair and blue eyes is as powerful as a mountain but as weak as a candle. He is accompanied by an elegant butler named Lolisky who is always worried about the "energy consumption" bill. When the demonic tide of annihilation tears apart the border and the Whisper of the Heart-corroding Shadow spreads, Tony's "lie down and save energy" rule is on the verge of collapse. In order to protect Chiagu, who may not even be considered a "meal ticket", he was forced to break through the system limits again and again and surge on the tip of the knife! The system frantically alarmed: "Warning! Rule conflict! High-priority guard command detected! Energy consumption: not counted!!" Save energy or protect? Lie down or risk your life? In this world where only by burning one's will can one fight against darkness, the most "energy-saving" choice may just be...