Rafayel Cassius Delaire, a guy who never really cared about anything, suddenly met Elior Aidan Vireo. He had no idea that Elior went to the same school as him, he only noticed him now, thanks to their not-so-ordinary encounter on the bridge. Later on, he finds out that Elior has selective mutism. But what caused it? That's what he wants to know, or at least, that's what he thinks. Deep down, he doesn't just want to understand why Elior became selectively mute... he also wants to know more about Elior himself. Will he get to know more about him and find out the reason behind Elior's silence, or be left with nothing but silence?