In an attempt to find something he can do for Chizuru, who has lost Sayuri, Kazuya calls Sumi, his "rental girlfriend," and confides in her about his situation.
Sumi listens intently and tries to pull Kazuya away somewhere.
"I also want to do something for Chizuru-chan..."
Their destination turns out to be the sea...!?

Towards the end of their encouraging date, while they were setting off sparklers in a park at night, Kazuya witnessed Chizuru's eyes welling up with tears and her body trembling.
As Chizuru quickly returned to her usual smile, Kazuya was reminded of their relationship as "rental girlfriend and client," and he was struck by his own powerlessness.
Recalling all the different sides of Chizuru he had seen up until then, Kazuya slowly began to speak—
"My... 'ideal girlfriend' is..."