Monster no Goshujin-sama

Everyone in a high school is suddenly transported to another world and upon arrival they are attacked by monsters only to find out that some of the students now have superpowers. Those who don’t have powers are called the Stay Home Group and those who do are called the Exploration Group. One day while most of the Exploration Group is out those who stayed start killing and raping the Stay Home Group.
Here we meet our protagonist a normal guy who has no ability and has just barely escaped death at the hands of his fellow schoolmates. He ends up far away in a cave about to die from his wounds and his exhaustion… when a slime enters the cave and starts to eat his hand all he can do is say “…please… someone out there… help me….”