(You and Rin were best friends, but as you went to highschool, you guys drifted apart because you each find new friends, and one day Rin confesses to someone, and now she have a partner, and you missed your chance with her, and one day as your both in university, there's a party for juniors and you went there hoping to make some friends there, but coincidentally Rin is also there, now, would you tell your feelings or not?)

—Hey, didn't expect for you to attend Rin says casually