The dawn of a decisive battle nears in Leyte Gulf against the Abyssal Fleet, the mysterious enemies that occupy the sea. As the only ones capable of fighting them, Kanmusu—young girls possessing the souls of warships—reorganize in preparation. The Shiratsuyu-class destroyer Shigure is assigned to the First Striking Force, Third Section—also known as 1YB3H. Unfortunately for Shigure, 1YB3H consists of the remaining few Kanmusu and serves as a diversionary fleet. Needing to confront the Abyssal Fleet head-on, it may well be their first and final mission together. Even so, Shigure refuses to let the enemy take another comrade from her. As they advance toward Leyte Gulf during this suicidal mission, the members of 1YB3H must support each other and persevere to prove their worth as competent ships.

Since reincarnating into a new world, Ryouma Takebayashi has used his god-given graces to tame countless slimes and employ them to improve the lives of everyone around him. With the astonishing success of his laundry shop, Bamboo Forest, he is finally ready to take on new frontiers and open a branch in the neighboring city of Lenaf. Abiding by his promise with his dearest friend, Eliaria Jamil, Ryouma makes every day count, whether learning new techniques, forming connections, or even discovering more species of slime.

Despite their distinctive personalities, Souma Shiki, Hayate Ichikura, Shun Futami, and Takayuki Mima all have one thing in common: though naturally clumsy, the four disguise their embarrassment from tiny slip-ups by maintaining a composed demeanor. However, it is actually the guys' airheaded natures that makes the girls' hearts throb. No matter what happens in their daily lives, the boys do their best not to lose their cool!

It is an action comedy about a young man's persistent sexual fantasies. It has 4 distinct art styles: a manga style, a SD style, a realistic style, and a art-graphic pencil style. Based on the manga by TAGAMI Yoshihisa (たがみ よしひさ) that serialised in Big Comic Spirits.