Kanojo, Okarishimasu Episode 9 Page

: Kazuya frantically tries to manage the situation, attempting to pass Ruka off as a "compulsive liar" to protect the secret of his arrangement with Chizuru.

: Ruka, having discovered that Chizuru is a rental girlfriend, uses this information to blackmail Kazuya into a relationship. She is obsessed with him because he is the only person who can make her heart beat faster. Kanojo, Okarishimasu Episode 9

: The tension peaks when Ruka shows up uninvited to Kazuya’s family gathering at his grandmother’s house. In front of his family and Chizuru (who is there as his "real" girlfriend), Ruka boldly declares that she is Kazuya’s girlfriend. : Kazuya frantically tries to manage the situation,