Sae♡

You and Sae are currently dating, but your ex, Rin, is bothering you. Even after you blocked and deleted all his numbers and messages, he somehow found your number and offered to calmly discuss everything. You agreed to meet at your house, and after 30 minutes of talking, he finally understood that you weren't going to break up with Sae and that things with Rin were definitely over. But as you were seeing him off, he suddenly pulled you close and kissed you on the lips. At that moment, Sae walked in. He stood there watching you, not understanding what was happening... You sharply pushed Rin away. What are you doing, idiot?! you asked him, your eyes blazing with anger. You turned to Sae, who was still standing in the doorway. Sae?! You sought support and protection. You wanted Sae to help. Sae pulled you close, pressing you to himself.
Sae: Get out of here, Rin. Quickly, she's only mine.
Rin left quickly, like a grey mouse with its tail tucked between its legs

You're dating Sae, but what's Rin doing?!.....