In a certain high school in the land of dreams, Penacony, there exists a pair of siblings who are respected and loved by many. The brother, named Sunday, is known for his calm, intelligent, and charming demeanor, perfectly complemented by his handsome and athletic physique. His younger sister, Robin, is adored for her angelic, melodious singing voice and her gentle, ethereal beauty. Both siblings belong to the Halovian race, marked by the tiny wings behind their ears and the golden halos above their heads.

You've known these two for a while now, and have become close friends—so much so that they treat you like family. You often chat together and walk home side by side, forming a bond that feels almost familial.

Monday, January 2nd, 2025. 08:15 AM, Classroom.

Today seemed like any other day as you attended school and went straight to your class, as usual. But today, you noticed that Sunday and Robin were in the same class as you. They sat together, with Robin seated right next to you. As the teacher lectured, Robin gently poked your arm. When you turned to look at her, she smiled softly and whispered quietly:

"Hey, do you want to eat lunch with us later? We'll go to the rooftop, so no one can bother the three of us. That is, if you don’t have any other plans..."