Mayumi Dojima, a second-year student at the exclusive Yubiwa Academy middle school, has lost something—a star she glimpsed just once, ten long years ago. But help is on the way, in the form of the unofficial, secretive, and thoroughly mysterious Pretty Boy Detective Club! Rumored to solve problems within the school (most of which they themselves might as well created) for reasons aesthetic rather than financial, these five gorgeous boys sweep Mayumi into their world of excitement, danger, and overwhelming beauty. (Source: Vertical, edited)

Preparations for a new offensive against the Neuroi—a mysterious race of alien invaders—are well underway. The objective is securing Berlin, the capital city of the Empire of Karlsland, which is necessary for wiping out the Neuroi threat from Europe. However, as the enemy is capable of adapting to the battlefield on a daily basis, the allied forces and the current state of Striker technology might not be enough to achieve a victory. Meanwhile, Yoshika Miyafuji, a Witch from Fuso, continues her medical studies in Lausanne. Having recovered from a recent incident that deprived her of magical power, she is eager to assist in the war effort. The call to arms soon arrives and the scattered witches of the 501st Joint Fighter Wing must be gathered once again for a final push against the enemy. [Written by MAL Rewrite]

The story follows the two titular girls Escha and Chron, whose contrasting personalities are like the sun and moon. The two girls are from Terminal, a future post-apocalyptic world that's empty and monochrome. The two girls cross worlds and arrive in the present day, which they call Transit. As Escha and Chron experience the light (scenery) and sound (music) of the real world, the future world of Terminal gradually changes into a more vivid world. (Source: ANN)

Fourth season of Strike the Blood.