Synopsis: Shinai naru F e - Opera-za no Kaijin

"F" is the nickname given to the mysterious individual who haunts the Paris opera house. Reports have circulated about F's impressive magical abilities, musical talents, and enthralling voice. F is also notorious for making unusual demands, which no one dares to challenge. Christine Daaé is a member of the opera house's chorus, and she has spent her life surrounded by music thanks to her father's profession. While struggling to save her father's treasured item from falling into the river, Christine is saved by a stranger with captivating red eyes. However, the individual disappears into thin air. When the leading lady of the next performance, Carlotta, retires, Christine is approached with the offer to take on the role. Despite her reservations about performing solo, Christine agrees to the opportunity. Curious to meet the elusive F, she ventures to the central-western balcony and is taken aback to find that the phantom is standing before her. To her surprise, the stranger who saved her from the river is revealed to be the enigmatic F, or Erik. He agrees to teach Christine to sing, but only on the condition that she pledges to love nothing except music, not even him.