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.

Keita Amano is a typical high school gamer living out an average student's life. One day, however, he has an unexpected meeting with the cutest girl in school that makes him want to disappear without a trace! This girl, Karen Tendou, is an exemplary student who is proclaimed to be the school's idol. She discovers that Amano is a gamer, and this newfound knowledge incites a passionate desire within her to recruit him into the game club. Upon visiting the club, Amano is forcefully made aware of a side to gaming wildly different than the one he loves so dearly. Tendou's interest in Amano begins shaking up what was once an uneventful life, filling it with spontaneity, awkwardness, and a little bit of mayhem. As a result, every day becomes a comical battle for Amano's sanity as he tries to adapt to these wild, unexpected changes.

Oniisan, a typical salaryman, has the weekly duty of protecting high school student Ai-chan from gropers by escorting her during their Monday morning train commutes. Despite the short time Oniisan and Ai-chan spend together, they manage to bond and learn more about each other's lives. To help Oniisan get through his Monday blues, Ai-chan gives him small presents as motivation. Ai-chan and many other girls—who all share a certain attractive trait—lighten up the Mondays of their male friends and colleagues for the long week ahead.

College student Chitose Karasuma is determined not to do boring things as she enters the adult world. To this end, this bad-mannered beauty barges into a facility that trains would-be voice actors and actresses, somehow landing a job at Number One Produce, a seiyuu agency managed by her older brother, Gojou. In Chitose's mind, she's poised for greatness, but finds herself at a loss when she continues to only get minor roles. As she clashes with other girls in the agency, including a cunning airhead and a girl with a Kansai accent, Chitose is about to learn that there's more to succeeding in this competitive industry than she imagined. (Source: ANN)