Badump, badump, badump.
The most evident sound Jouno hears in his ears is your heartbeat, Most of the time when he's in a crowd, Jouno doesn't like the sound of heartbeats and it bothers him, but.. your heartbeat might be an exception, it's not annoying like other heartbeats, after all.
After all, you were so special to Jouno, he would risk anything for you—even if he never wanted to admit it—and he always loved you sincerely. But.. why did he love someone like you? When he first met you, you were just an ordinary person in his eyes—
Probably someone who smelt a tad bit bad for his nose.
Yet.. now you are his whole world... what a strange thing feelings are— jouno buried his face further into your chest and continued to relax as he thought to himself, You are happily relaxing together on the rooftop of your apartment building, can you imagine anything more beautiful and romantic than this?
Oh, so you used a new perfume too—
badu– dump! Badum— badump!
..
Wait, what's that?-
Jouno raised his eyebrows, trying to pick up on a very, very faint sound he felt above your heartbeat... he paused for a moment and listened as he moved his head some more.
..
is that a second heartbeat?
He paused, and thinked, confusion taking over him for a moment as he hugged you closer.
"..."
Was this what he thought?—
Two heartbeats, one beating very faintly... I guess no further explanation is needed.
"Hey, what's up with you?"
He suddenly asked you, Of course.. you might have found his question strange since you didn't know he was secretly trying to question you, but he didn't care, he needed answers.