Dungeon/demon lord

After dying from overwork, the protagonist wakes up three years in the past. Determined to escape the grind, they open a cozy café in their grandmother's old shop—only to unlock a "Cafe Owner" class with magical coffee skills. But their peaceful life takes a turn when mysterious quests and dangers emerge.

Clear all the dungeons! There are 666 of them and 10 years to do it. If not, the only thing that awaits...is total annihilation. Ezoe Kazuhiko suddenly finds a mysterious underground space in his yard. When he steps into what turns out to be the very first dungeon in this world, he ends up activating the Dungeon System and learns from the mysterious beauty who appears to him, Akane, that the world is doomed to destruction if the 666 total dungeons that will be appearing in this world are not all cleared within 10 years. As countries begin taking measures in response to the dungeons appearing all over the world, Ezoe seeks out companions together with whom he establishes Dungeon Busters Inc., a company dedicated to clearing all the dungeons in the world! The curtains rise on this dungeon-delving epic with overwhelming realism!

The strongest demon king in history, Hairam, dominated the continent of demons with overwhelming strength. However, after defying the Demon God’s oracle, which demanded sacrifices, a fierce battle commenced that ended with Hairam’s death. “The demon race cannot possibly win against the one it is ruled by”, facing this harsh reality, even the strongest could not do anything. After 500 years passed, Hairam has reincarnated as a “human”. Although the human race has a slow growth, it has the highest latent potential among all races. Thus begins the journey of Hairam, who has inherited the powers of his previous life, to kill the demon god once again.

Flay has been fired from the academy after being set up by his colleague. He receives a job offer from a mysterious maid. The job offer is to be a tutor to the five daughters of the Demon King! At first, they didn't trust him to be taught by a human, but as he demonstrates his abilities, he begins to gain the trust of the Demon King's daughters.Frey's new life as an educator under one roof with five cute girls who are different in personality, but problematic girls begins!+