16-year-old Yukito Kirihara lives with his 14-year-old sister Sana, who he treasures more than anyone else. But when an ogre shows up outside of his window looking for Sana (a shocking event in its own right), Yukito leaps to save her—and is killed. He’s offered the promise of reincarnation by a mysterious woman, who gives him a character sheet in a mysterious book. But when Yukito sees Sana in there, too, he sets off to find her, and save them both—even if he only has 1 hp with which to do it!

[Source: Kodansha USA]

The series follows Henri Cleats, an adventurer who only has a single skill: Evasion. Wanting to take care of his sickly younger sister Colette, he joins a party. However, due to weak attack power and lack of skills, he is expelled from this party. However, it turns out that his evasion skill comes with a bonus: he is able to pass through walls and reach the end of dungeons without defeating the boss. Thus, he is able to claim a dungeon's First Clear bonus more than once. With his newfound knowledge, Henri sets out to clear as many dungeons as he can while also leveling up his power.

[Source: Wikipedia]