Takamine Kiyomaro, a depressed don't-care-about-the-world guy, was suddenly given a little demon named Gash Bell to take care of. Little does he know that Gash is embroiled into an intense fight to see who is the ruler of the demon world. All of the demons have to pick a master on Earth and duke it out with other demons until one survives. Needless to say, Kiyomaro becomes Gash's master, and through their many battles, Kiyomaro learns the importance of friendship and courage.

There was once a man who was summoned to another world, and saved it. Of course, he became too popular there, and turned into an isekai-normie. However, that man fell into a trap and was forcibly returned to his original world. Moreover, he had to start over as a baby! This is the story of the way-too-fantastic ex-hero who lived as a gloomy high-schooler, as he gets summoned once again to that same other world in a very unexpected development! (Source: Coolmic, edited)

Setsu Sawamura runs away from his small home village following the death of his grandfather, the legendary shamisen master Matsugorou Sawamura. On his deathbed, Matsugorou told Setsu to give up the shamisen if he was only going to imitate others instead of playing in his own way. Grieving, Setsu heads for Tokyo, hoping that the big city can inspire him to discover his own unique playing style. But Tokyo defies his expectations by drowning out all other sounds with the deafening noise of its city life. Concerned about her son, Setsu's rich and successful mother, Umeko, waltzes back into his life and forces him to enroll in Umezono Academy. At the school, he meets Shuri Maeda, a girl who is fascinated by the Tsugaru shamisen and wishes to perform a song her grandmother once heard a long time ago. Shuri starts up a shamisen appreciation club and convinces Setsu to teach the members how to play the instrument. As he becomes more involved with the club, will Setsu be able to recover his love for the shamisen and discover the unique sound he lacks?

In the distant future, the nature of war has changed. Objects—massive, spherical tanks impermeable to standard weaponry and armed with destructive firepower—rule the battlefield; their very deployment ensures victory, rendering traditional armies useless. However, this new method of warfare is about to be turned on its head. Qwenthur Barbotage, a student studying Object Design, and Havia Winchell, a radar analyst of noble birth, serve in the Legitimate Kingdom's 37th Mobile Maintenance Battalion, tasked with supporting the Baby Magnum, one of the nation's Objects. Unfortunately, a battle gone awry places the duo in a precarious situation: mere infantry stand face-to-face against the unfathomable might of an enemy Object. As they scramble to save themselves and their fellow soldiers, a glimmer of hope shines through, and the world's perception of Objects is changed forever. Heavy Object follows these two soldiers alongside Milinda Brantini, the Baby Magnum's pilot, and their commanding officer Frolaytia Capistrano as the unit treks all over the globe to fight battle after battle. Facing one impossible situation after another, they must summon all their wit and courage to overcome the insurmountable foes that are Objects.