Udon Kamono 
Mapping: The Trash-Tier Skill That Got Me Into a Top-Tier Party (Manga) Volume 3 [EPUB ebook] 

The Arrivers are finally working together as a team and making steady progress in the dungeon, but it’s too soon to celebrate. New floors mean new challenges, and things only get more dangerous the further in they go. When an unexpected turn of events strands Note and Erin in an unfamiliar labyrinth, they’ll both have to dig deep to make it out alive—if they make it out at all. They’re going to need their skills, their wits, and each other to win this deathmatch.