Manga by author Higure Minto

An entire school has been tossed into a fantasy world without knowing what happened. Suddenly monsters attack and kill a lot of students, but then other students started to fight back with cheat abilities. A few days later, everyone has been divided into the Stay Home Group and Exploration Group. The exploration group wanted to see if theres anything else to find and take care off in the forest that they are in. They are armed to brim with cheats and makeshift weapons. The Stay Home Group doesnt have cheat abilities. after the Exploration Group leaves, the stay home group gets split as a riot ensues. Student killing student, girls getting raped by their fellow classmates and our MC starts to run towards the forest. After running, evading lots of monsters he winds up in a cave, exhausted and almost ready to die when a Slime approaches him. It first tried to eat his hand and all he could do was ...please someone out there help me. Original Web Novel

Everyone in a high school is suddenly transported to another world. As they are attacked by monsters they find that some of the students now have superpowers. They organize themselves into two groups. Those without powers are called the Stay Home Group and those with them are called the Exploration Group. On a day where most of the Exploration Group is out, the remaining ones that stay behind start the slaughtering and raping of the Stay Home Group. Here we meet our protagonist, an average guy with no abilities who had just barely escaped death at the hands of his schoolmates. He ends up far away in a cave on the verge of death, exhausted and wounded when a slime enters the cave and starts eating away at his hand. All he can do is utter, "please someone out there help me."