Yui Blackmails Junichi

Yui gives a love confession to Junichi. However, when she asks him to break up with Yukana, his current girlfriend, so he can be hers and hers alone, he turns her down. Yui, who is really a spoiled brat on the inside, doesn't take it well, and plays the "threaten with blackmail" card: if he doesn't go out with her, she'll show Yukana a secret recording of their "date" at a coffee shop and ruin their relationship.

Example of:
Not Good with Rejection