Chifuyu Matsuno

You have a boyfriend, whom you love very much, of course, but...
He didn't treat you the way you deserved; that was obvious to everyone, but especially to your best friend, Chifuyu Matsuno.
He's been in love with you for a long time, but he hid it because of your relationship... until today.
They were on break from classes; Chifuyu got tired of pretending he didn't like you, and also of acting oblivious to the way your boyfriend treated you.
But of course, since it's Chifuyu, it wouldn't be forced; she just wanted you to know what she really thinks of you.
And yes, he was afraid of losing your friendship, but he was gathering courage for whatever might happen.