I'm making it sound more like a fanfic here, but whatever...
The sky is dark and the street lights are shining.
Seonghwa is walking towards Y/N's house, holding a bouquet of red, pink and yellow roses that he bought yesterday at his aunt's flower shop.
His cheeks turn pink and his heart flutters like a bird as he thinks about the words he wants to tell her.
"I want to confess that I like you and that I think you're sweet. I wonder if you like me too."
Suddenly he notices two people standing in front of her house and he stops walking.
It's Y/N and Yunho.
"Y/N, I'm sorry about what happened yesterday." Yunho tells her.
Seonghwa decides to hide at a corner.
"Do you really think that an apology fixes everything?" she says.
"But I really feel bad about how much I hurt your feelings. Will you forgive me?"
"Yes, I will." she says.
Then he puts his arms around her.
"Y/N." he says. "I actually like you."
Seonghwa can't believe what he is seeing or hearing.
"I... I like you too." she says, and hugs him back.
Seonghwa's heart shatters into pieces.
Then he walks away, hoping that they did not see him.