Two years have passed since the EL-Divers incident, and the popularity of the game Gunpla Battle Nexus Online (GBN) has continued to skyrocket. With the addition of exciting new features such as missions and story events, the GBN experience is more immersive than ever before. Amidst the player base, a user known as Hiroto Kuga has been gaining notoriety for his top-notch skills. Through a series of coincidences, Hiroto meets three other players: the boastful Kazami Torimachi, the mysterious May, and the timid Parviz. Forming the "BUILD DiVERS," the unlikely group sets on a story mission rumored to carry bountiful in-game rewards. Together, the BUILD DiVERS must confront their own weaknesses as they join arms in a journey that may very well transcend the existence of GBN itself. [Written by MAL Rewrite]

When Saga—now 15 years old—arrives at her home after a day of errands, her grandmother Regina discovers an old dress in the attic. At this point, Saga recalls the time her elementary class participated in a play titled "Princess and Fairy." She volunteered to play the role of the Princess while her rival Greta played the evil witch. The production of the school play reminded Sugar and the other fairies of the time "The Bear Pianist" played in the town not too long ago.

The war between the Terrans and the Vers Empire of Mars has ended, allowing humanity to blissfully enjoy their lives in a time of peace. Nineteen months later, however, the Vers princess makes a shocking public declaration: "the Terrans are a foolish race that covets resources, destroys nature, and are devoted to the pursuit of pleasure." And so, to protect their precious Earth, she calls upon her knights to take up arms, and the raging battle between the two civilizations reignites. Slaine Troyard has found a place among the Martians, giving Earth a short respite from the war against the Vers Empire. However, a peaceful resolution seems inconceivable. The various people who fought desperately for survival in the past now find themselves in the midst of yet another bloody and chaotic conflict, one that will forever alter the fate of humankind.

Freelance photographer Kouhei Morioka is traveling to a castle in Germany to take photos of paranormal activity for his friend Hiromi Anzai, editor of an occult magazine. Upon entering the castle, he's confronted by a young girl in a white dress and cat ears who calls herself Hazuki. She takes a keen interest in Kouhei and offers him a kiss, but she instead reveals herself to be a vampire, sucks his blood, and turns him into her slave. Much to Hazuki's dismay, however, Kouhei is unaffected by her bite. Hoping to escape the castle and her possessive butler Vigo, Hazuki instead forces Kouhei to help her. With the help of his powerful exorcist cousin Seiji Midou, the two make it out safely. Finally free, Hazuki flees to Japan in search of her mother. Not long after Kouhei returns home, he discovers Hazuki has nested in his home, where he reluctantly allows her to stay. Meanwhile, other vampires set out to find the missing Hazuki. Equal parts gothic and adorable, Tsukuyomi: Moonphase is a charming and mystical story where two unlikely allies form a unique bond in an attempt to defy a society of immortals. [Written by MAL Rewrite]