Daniel is one of the last remaining humans in the tower. The tower is a never ending dungeon that has crushed humanity over and over. A dark god comes to the last 4 survivors and offers them a choice. One person can go back to their first day in the tower with all their knowledge and skills.
This is a very fun story! The narrator is top notch. The character makes intelligent choices. There is minor language. No harem. No sex.
The only downside is that the story is on the short side at just over 4 hours.