"H-hey!"
You were cornered on the wall by a tall, pretty girl, maybe that girl is the scary girl that Josuke said in a message, the girl who declared herself to Koichi?
The girl bent down to stay on her level.
"What are you doing ---"
She started to smell your neck !?
"Hm, w-what are you doing?"
Her voice got low.
"Just making sure you don't smell like Koichi..."
OK, this is the scary girl that Josuke said.
"I trust you don't want to take Koichi away from me, even though you smell very little of him, but I believe it must be that you walk with him." Her voice is still low and strangely endearing.
You try to speak but she interrupts you again:
"You are cute and beautiful, but I trust you, even more!" She talks while she lets you go.
Maybe you should tell Koichi about it.