24th of December, Silent night, senpai and I went out to look for the floating shadow. At that time we were kidnapped by aliens! The clumsy aliens accidentally swapped our brains, consequently "I became senpai and senpai turned into me... " My new daily school life is in chaos, who can tell me what is going on? *Note: The series won the Silver Prize in the 10th Dengeki Novel Prize.*

Yusuke Tashiro moves to Tokyo to attend Hojo High School, a private co-ed school. He is living alone in a house owned by his uncle and his wife who moved abroad, so he asks a real estate agent to help him find a roommate. However, due to a mistake by the real estate agent, he ends up living under the same roof with a cute, innocent, but strong-willed girl named Kei Yamaba. Akimi Sugimura, a smart girl in his class, also takes an interest in Yusuke. While Yusuke deepens his friendship with Akimi, he is unable to give up his feelings for Kei, and is torn between the two. As the university entrance exam looms, Yusuke tries to find the answer about his relationship with Kei and Akimi, as well as his future career path. (Source: Wikipedia, translated)

The right arm of the medic holds the death and fate of the battlefield in his palm— The Kingdom and the Empire were engaged in harsh battle. A combat medic corps of the Stars, the Kingdom’s elite unit, led by captain Medic was assigned to escort a newcomer of Stars, Lilith. The strongest medic march into a battlefield of certain death to save the girl who rejects sacrifice—! (Source: Kadokawa, translated)

One day in the near future, the Japanese Self-Defense Force decides to transfer the command (and financing) of their air force to private companies and investors. Most reject the idea as a joke, but some show business-oriented companies catch up on the idea, spawning the birth of a new type of idol: the so-called "Idol Pilots", celebrity combat pilots. The five Toreishi sisters, Kanna, Yayoi, Satsuki, Uzuki, and Mina, are teenage idol singers who are collectively known as The Hummingbirds. They are also one of the ace fighter pilot squadrons in the Japanese military. When they aren't saving the world from major overseas threats, they are on stage in frilly dresses, pursuing their idol career. This is the story of how they came to be Japan's most successful idol group and their first line of defense.