In the servers, Souta desperately fights the Angelus Gemini in order to protect his world and his friends by placing "Death Flag" upon his enemies. Meanwhile, Nanami found out everyone has forgotten about Souta, and his existence is overwritten. During their graduation day, all Quest Dorm members are going for separate ways. The Quest Dorm is said to be demolished soon. Nanami breaks into Souta's room, and find the letter that Souta received, written by her handwriting, thus breaking Souta's Protect Mode...