Bundled with manga's tenth and eleventh volume.

Keitaro has finally passed the entrance exams, and is officially a Toudai student. But after breaking his leg in an accident in the entrance ceremony, he thought and re-evaluated himself. Having new goals, Keitaro follows Seta on an overseas archeology trip. During his absence, however, all was not well in Hinata Lodge. Urashima Kanako, Keitaro's sister, arrives on the scene. She claims to be the new manager of Hinata Lodge starts to go against all the tenants. Things become even more complicated when they recieve a letter from Keitaro. The tenants and Kanako made a big mess trying to get the letter, but Seta's car crashes in before anyone could read the letter...

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]

With the completion of the Summer Troupe's show, Izumi Tachibana must now recruit five members for the next sub-troupe, the Autumn Troupe. Luckily, enough people arrive at the audition: Banri Settsu, a talented but boastful jack of all trades; Juuza Hyoudou, a stone-faced delinquent passionate about acting; Taichi Nanao, a man wanting to impress girls through the stage; Omi Fushimi, a college student, amateur photographer, and adept cook; and Sakyou Furuichi, a yakuza member who shares a past connection with the Mankai Company. But between the non-existent teamwork and multiple threats jeopardizing the show's success, Izumi realizes that the troupe might be more difficult to handle than she first thought. How will she be able to unite them in time for their debut performance?