The school teachers arrive not long ago, they check and asked what happen and after discovering that there's a high level monster in the zone they decide to stop the whole event taking all the students back.
As for Lou and his group, the teacher conduct full body check-up and a mental test to ensure their well being and after completing all the test they let them go back.
...
Inside of the buss.
"Did you heard the news?"
"What news?"
"There's boss monster inside of the Slime Field."
"Boss Monster? Is that the Slime Boss?"
"What Slime Boss?" Lou confused asked.
"I heard that the other class encounter Slime Boss inside of the Swamp Field, it's a green huge ball of acid that can melt any type of clothes."
"?"
Lou look at their face showing what they thinking right now, and just like he expected what they said next show their inner intension.
"Damn it! Why I'm not on that group!"
"I heard twenty student come back with only piece of clothing on their body, and 18 of them are girls."
"What! Girls!?"
"Yes, I heard they are four groups when they encounter the Boss, they thought that it's a slime anyway so it's easy to defeat."
"Well even me will think same."
Its not hard for a student to think Slimw to be strong, so it's normal for them to try to fight a Boss Slime.
After all, Boss Slime is on the lowest boss ranking, next to Goblin Boss and Rabbit Boss so trying to defeat the lowest is normal even with other students.
"The Slime Boss only have three skill, Acid Breath, Slime Tentacles, and Physical Immunity, just Physical Immunity already make every melee class useless."
"And they still try to fight it?"
"They have two mage class so they try it, one Fire Mage and other is Wind Mage, but in the end they fail."
"But they are lucky, the boss is not aggressive so they escape in time."
"I also heard the Swamp Field is full with Acid right now.*
"That's why the school decided to stop this to prevent anyone from getting hurt."
"But this did not stop the aide quest, I heard they will collect all Monster Core later."
"Really? That's sad, we only get couple of monster."
"What about you Lou?"
Shu look at Lou asking, he feel that their group made huge than Lou's group.
Lou touch his bag and feel the soccer ball size Monster Core and said." It's fine, we kill some."
"Don't be sad, we know your ability."
"That's right Lou."
"By the way, how is your relationship with Onodera-chan?"
"What so you mean?"
The boys look at him like a fool, how can't they see Onodera's feeling for him, it's clearly visible, the only thing they waiting is to someone will step first.
"What a fool."