One day, Koizumi-san leaves school saying that she has something to do.
Yuu is doesn't think anything of it, sure that she is talking about ramen again.
But of course, Yuu tails her again, and she sees Koizumi-san waiting for someone in front of a fancy western restaurant. When a dashing man appears she yells "Koizumi-san, don't!"
Seriously, Yuu, Koizumi 
has totally poisoned you.
.بحق يا يو، إنّك متسممة من كويزومي-سان تمامًا
Yu. Koizumi hat dich
wirklich komplett vergiftet.
Koizumi de verdad te ha envenenado.
Koizumi de verdad te ha envenenado.
Yû, tu passes trop de temps
avec Koizumi…
Sério, Yuu, a Koizumi te contaminou.
Я не шучу, Ю, Коидзуми тебя заразила.