アズールレーン びそくぜんしんっ!

Earth faces an unprecedented threat from an invasion by the mysterious Kiseichuu. The Kiseichuu feed on human sexual energy, also known as “H-energy”, and weaken the human population. High school student Retto Enjo is a member of the hero group HXEROS, who fight together to save the earth from the Kiseichuu.

Illyasviel von Einzbern is an ordinary elementary school student who becomes a magical girl when the magical Kaleidostick Ruby deems her a more suitable master than the sorceress, Rin Tohsaka. Rin, who had been tasked by the wizard Zelretch to collect the seven Class Cards containing the spirits of Heroic Spirits from legend, finds that she is unable to change Ruby's mind and must supervise Illya in completing the task of collecting the Class Cards. During Illya's adventures, she receives a friend and rival in a girl named Miyu, the contracted master of the Kaleidostick Sapphire, which similarly abandoned its original master and Rin's rival, Luvia Edelfelt.

At first glance Yukishiro Nanako seems like a normal high school girl, but she has a notable eccentricity: instead of speaking, she communicates only through written senryu poetry! This means she expresses herself only in 5-7-5 syllables. To most this might seem like an inconvenience, but for Nanako and her ex-delinquent bestie, Busujima Eiji, it adds to the experience of their high school lives as they run the Literature Club.