Kimihiko Kimizuka has found himself inadvertently entangled in various crimes more times than he can remember, referring to himself as a magnet for trouble. One day, as if it was nothing out of the ordinary, a group of unknown men kidnaps him, forcing him to board a flight—where he also encounters a hijacking. Amid the resulting chaos, however, Kimizuka meets a stunning silver-haired beauty, going by the codename Siesta, who then saves the day. Claiming to be a legendary detective, Siesta enlists Kimizuka to be her sidekick. Though Kimizuka refuses at first, with Siesta's insistence, he eventually joins her—marking the start of a grand adventure spanning the entire world, preventing multiple threats that could spell doom for humanity along the way. Unfortunately, after three years of their unpredictable yet enjoyable time together, Siesta abruptly passes away. Distraught, Kimizuka tries to leave all memories of her behind, but as he begins to meet more people, it seems that Siesta's influence will never truly die.

Satisfied with his investigation of Lala Lai Theatrical Company, Aquamarine Aqua Hoshino shifts his focus from revenge to career growth and becomes a regular on the variety show Dig Deep! Chase the Impawsible. With memories of his mother still lingering in his mind, Aqua cuts contact with Kana Arima, leaving her unable to enjoy the surging popularity of her idol group, B-Komachi. Meanwhile, following the bone-chilling discovery during B-Komachi's recent music video shoot, Aqua's sister, Ruby, resolves to solve the murders of those dearest to her. With the help of another soul still weighed down by Ai Hoshino's untimely demise, Ruby rises through the ranks, using any means necessary to get her way.

In the wake of their first home burning down, Nasa and Tsukasa Yuzaki are seeking temporary shelter at the Arisugawas' bathhouse. Though they have only been married for a short time, their relationship has only become sweeter by the day. Nasa is determined to spend as much time with his wife as possible, basking in the happiness of their marriage. The newlyweds find new ways to explore their relationship. From adopting a cat, going to an amusement park, and even watching an impromptu romantic comedy featuring Nasa's former teacher, every day is a new experience. But while Tsukasa continues to meet the people in Nasa's life, Nasa has yet to meet more of Tsukasa's family. Though they appear to be the picture-perfect couple to everyone around them, Nasa begins to wonder if he will ever learn more about his wife's mysterious past.

Five hundred years ago, the fantasy world of Alneath was torn apart by a war between magically gifted immortals and mortals armed with magical artifacts. The conflict came to an end when mortals' hero, Gram, slayed the Demon Lord Veltol Velvet Velsvolt. In 2099, the world looks a bit different. Alneath and technologically advanced Earth have fused in an event known as Fantasion. Immortals have been hunted down to near extinction, and technological implants called Familia allow mortals to use magic. As the new world slowly recovers, Veltol's vassal Machina Solege resurrects him in Shinjuku, a techno-magical city constructed in the middle of devastated lands. However, Veltol's magic is severely weakened, and his former ally Marcus has betrayed him. To regain his fame and magical abilities, Veltol follows the advice of Takahashi—Machina's friend and a professional hacker—to start an unusual career: live streaming. His sharp tongue and comically poor gaming skills quickly secure him followers, but to dominate the world once again, Veltol must first uncover Shinjuku's secrets and thwart Marcus' vile plans.