When the "Sirens," an alien force with an arsenal far surpassing the limits of current technology, suddenly appeared, a divided humanity stood in complete solidarity for the first time. Four countries—Eagle Union, Royal Navy, Sakura Empire, and Iron Blood—formed Azur Lane, paving the way for the improvement of modern warfare, which led to an initial victory against the common threat. However, this tenuous union was threatened by opposing ideals, dividing the alliance into two. Sakura Empire and Iron Blood broke away and formed the Red Axis, and humanity became fragmented once again. As a seasoned and experienced fighter, the "Grey Ghost" Enterprise shoulders Azur Lane's hope for ending the war. But behind her stoic persona hides a frail girl, afraid of the ocean. Even so, she continues to fight as she believes that it's the only purpose for her existence. Meanwhile, Javelin, Laffey, and Unicorn—three ships from the union—stumble upon Ayanami, a spy from the Red Axis. Strange as it may seem, they try to befriend her, but as enemies, their efforts are for naught. Still, they persevere in hopes of succeeding one day. Amidst the neverending conflict within humankind, the keys that could unite a fragmented race might exist: a soldier coming to terms with her mysterious personality and camaraderie between those with different ideals.

Despite performing as an idol group for three years, Idolls! has failed to make its mark on the entertainment world, only boasting a meager three fans. While the girls are venting their frustrations, a small wooden statue in their room suddenly starts speaking to them and convinces them to book a venue that seats one hundred fans. The only problem is that their performance is in just nine days! Now in a race against time, the girls must prove themselves worthy of stardom or face the harsh reality of failure.

Sequel to Arad: Suming Zhi Men.

Haru Nabatame, Rio Seibu, and Kyouka Tamaki's idol unit, TiNgS, is on the verge of disbandment. However, if they can fill all two thousand seats in their upcoming anniversary concert, their idol careers will live to see another day. This quota is seemingly impossible for a group like them, especially when the most people they have had at a show is 37. Fortunately, they are placed under a new talented manager—Naoki Hinase. While initially reluctant due to past experiences, Naoki takes charge of TiNgS after sensing Haru's genuine passion for idols with his own remarkable ability to see the shine of someone who is lying. Despite the challenges she faces in this ambitious endeavor, Haru wants everyone in the world to love idols, even willing to become the shining guidepost—shine post—to accomplish her dream.