The Equipment: Living Forms, or ELFs, were created over fifty thousand years ago to assist humankind in their combat against the Honkai—the decay. With the project's success, the ELFs soon became sentient, compelling humanity to treat them as near-equals. However, when the Ninth Herrscher laid waste to the planet, almost all traces of ELFs vanished into the Sea of Quanta's endless abyss. Yet, there seems to be a bubble universe where the ELFs' fate has taken a brighter turn. Here, they live peacefully among humans and attend a specialized institution, ELF Academy, where they study as if they were human beings themselves. From Selune's Elegy's chuunibyou tendencies to Blood Embrace's gangster shenanigans, the peaceful environment of the academy is guaranteed to provide relief from the depressing state of the main universe.

Mini anime featuring chibi characters from Enen no Shouboutai, streamed on the official Twitter account.

After Makoto Mizuhara agrees to testify against the boisterous student council president Katsuhiko Jinnai for bribing school clubs in the recent student council elections, Jinnai chases him down in an attempt to silence his self-proclaimed rival. Suddenly, during the chase, time stops for everyone—except Makoto. Perplexed, he wanders around the campus until he notices a light coming from the school's closed-off basement, where an ancient relic had just been uncovered. Makoto is walking toward the artifact surrounded by strings of light, when out of it comes an otherworldly woman who claims she has been waiting for ten thousand years to see him. Weakened by the passage of time, she uses her remaining power to transport a confused Makoto to another world, which she refers to as El-Hazard. However, others who are still at school are also caught in the spell, namely: Jinnai; Masamichi Fujisawa, the alcoholic teacher; and Nanami Jinnai, the headstrong sister of president Jinnai. The fantastical and magnificent world of El-Hazard awaits these four individuals where they will become entangled in the story of its inhabitants and embark on an adventure filled with laughter, danger, and even romance.

Just an ordinary teenager, Kobeni Yonomori receives quite the surprise on her 16th birthday—a fiancé and a sister-in-law she never even knew she had. As a result of an arrangement that her late grandfather made, Hakuya Mitsumine and his younger sister Mashiro have moved from their countryside home to the Yonomori household in order to deepen their relationship with their new family members. Mikakunin de Shinkoukei follows Kobeni's love life with Hakuya as she tries her best to adjust to the abrupt changes forced upon her. However, as some extraordinary secrets regarding the siblings come to light, Kobeni will find her life changed forever.