Mika, full name Yumika Aislidd, suffers from an incurable disease known as the infamous "Aislidd Lovesick Obsessive Syndrome", or ALOS for short. This disease has been passed down to females for generations, and their duty in life is to win their "beloved's" affection and heart, or they will suffer a life of eternal loneliness with no one to love. Mika is determined to win the heart of her beloved Austin Akerbloom, even if it means warfare and bloodshed.