Rose, a lone witch who lives quietly by the lake, is asked by the knight she secretly loves to brew a love potion—for someone else. Though heartbroken, she cannot refuse him, choosing instead to treasure the fleeting time they spend together gathering ingredients. And as the days quietly slip by, Rose finds herself clinging to each shared moment, dreading the day the potion is finally complete.

In the future, humanity wages war with giant humanoid weapons called Titanostrides. Isami Ao of the Japan Ground Self-Defense Force and Lewis Smith of the United States Marine Corps meet on the battlefield in Oahu, Hawaii. An enemy aircraft attacks, scattering their forces. To survive the battle and save their friends, unlikely comrades must find the courage to defeat this new threat.