Oboro is sitting in class, then he notices a love letter in his desk. It is a regular envelope with a red heart sticker to tape it shut. He looks on the back to see who wrote it, it’s anonymous. He then starts to open the card, seeing what’s inside.

^[meet me at the rooftop dumbingo :3]^

He gets confused, but after class, he goes to the rooftop, seeing you leaning on the nearest wall.