Trapped in a Dating Sim: The World of Otome Games is Tough for Mobs (Light Novel) Vol. 11

The Holy Kingdom of Rachel and its allies have Holfort Kingdom cornered, and the mighty nation has an ultimatum for Leon: He must hand over all his Lost Items for their military concord to share, or prepare for war! Thankfully, Queen Mylene has a plan. By sending Leon out on the front lines to battle Rachel, she can stall to hold diplomatic discussions with other nations. But there's something odd about how she's acting...