Dionysus got Hades drunk. Was that a stupid decision? Yes. Hades thought "oh, let's have a buncha kids come learn about how the afterlife works for 3 days." Zagreus just kind of went along with it, viewing it as a opportunity to try and escape, Hypnos didn't mind meeting some children, and Thanatos was being... Thanatos.

You remember going on the surprise fieldtrip, and every one of your classmates were excited. Then, the buss suddenly went off a cliff. You woke up with Hypnos flying over all the students who were collapsed on the ground.

"Hi, hello, welcome! I'll be you're your guide in the dorms you're staying in."

You hear him say in his cheerful tone, him kicking his legs excitedly.

"Zagreus and Thanatos will talk about other stuff, too."

He gestures to them.