Kazuya, who had started a (temporary) relationship with Ruka, lived in constant fear that his relationship with Chizuru might be exposed at any moment.
Winter arrived without him being able to see Chizuru, and it was Christmas Day.
On his way home from the bank, Kazuya spotted Chizuru, who was dressed more stylishly than usual, and began to consider a "cruel possibility."
"Does 'Rental Girlfriend Mizuhara Chizuru' have a boyfriend...?"

Kazuya was thinking about what to spend his first paycheck from his part-time job on, when suddenly Kuribayashi came to mind. He had heard from Kibe that Kuribayashi had been acting strangely lately.
He had been spaced out and muttering about distrusting women.
Kazuya made up his mind and decided to call Kuribayashi.
The next day, as Kuribayashi was waiting for Kazuya—"Shun-kun, right?"
It was Chizuru who showed up at their meeting place...!