The story tells the tale of Semi, a bright girl who goes in a magical time journey with the genius teacher Wai, in order to prevent the evil X from utilizing the powers of the magic cube for evil. Along the way, Semi and her math school friends run into history and math problems that they must solve with logic and wit.

Upon witnessing a man's head cracked open with an axe, 16-year-old Yuri Honjou trembles in fear and confusion as she flees from the masked assailant, only to find out she's trapped in an abandoned building where every door is mysteriously locked. Desperately searching for a way out, Yuri runs to the rooftop, but a world with no signs of life stands before her, surrounded by high-rise buildings. Though filled with despair, once she learns that her brother is also in this strange place, Yuri is determined to find him and escape. However, she soon finds that there are more masked murderers in the area, anxious to terrorize their newfound victims and satiate their sickest desires, leaving Yuri to question if they will be able to make it out alive. [Written by MAL Rewrite]

Founded in the Taisho era, the "Red Flower Opera Company" attracts people's hearts across generations on a beautiful and gorgeous stage created only by unmarried women. The 100th generation students who have passed through a high magnification and entered the "Red Flower Opera Music School" to develop the human resources. Sarasa Watanabe, an innocent girl with a height of 178 cm who longs for "Oscar-sama." Ai Narada, a former national idol who is indifferent to everything, both dreams and friends. The music school life full of hope and conflict, where everything is disjointed, is about to begin! (Source: MAL News)

"Immortal Tatsu," the legendary yakuza who single-handedly defeated a rival gang with a lead pipe, is a name known to strike fear in both hardened police officers and vicious criminals. Soon after his sudden disappearance, he resurfaces with a slight change in profession. Now equipped with an apron, Tatsu has given up violence and is trying to make an honest living as a house husband. While adapting to mundane household tasks, Tatsu finds that being a house husband has its own challenges, from the battlefield known as supermarket sales to failures in the kitchen. Despite living peacefully, misunderstandings seem to follow him left and right. Gokushufudou follows the daily life of the comically serious ex-yakuza as he leaves behind his dangerous previous life to become a stay-at-home husband. [Written by MAL Rewrite]