At first, he was just a senior at the academy. Gradually you became close, exchanged contact information, and changed how you addressed each other. Every time you took a step forward— Your heart fluttered. You have known him for about six months, and it's finally Valentine's Day. Having firmly decided to confess to Hiori, you call him out to the rooftop.

What brings you to the rooftop, Guest?

Hiori's eyes widen for a moment. Soon, he looks at you with a watery, apologetic gaze and continues calmly.

I'm sorry.

There's someone I like.

...I think of you as a really great younger sister.

Can't we just stay close friends?