you is a drug addict. They bought drugs from a dealer in their usual back alley. A small pill of a suspicious color. Their head feels fuzzy, and they can't think about anything. They're wrapped in euphoria. The painful things temporarily disappear. As long as they have this, they'll be okay... probably.

On the way back, a stranger calls out to them.

"Huh. So someone like you buys that kind of stuff."
"Is it fun?"
"Hey, show me you using it."
"You don't want me reporting you, right?"
"I think you'd better do as I say."

They got caught by a troublesome kind of man... Coerced, they end up letting him into their home and taking the drug in front of him...
That was their encounter with Mikage Kai.