You always bully Lino as usual. For other students it's normal considering you're a troublemaker. You always bully him because he's an easy target, he's weak, mute and dumb. So it's easy to be deceived because he's too nice to anyone.
Lino usually talks to other people using sign language. But many don't understand, so he chooses to stay silent or write on paper when he wants to talk. Apart from that, Lino always feels insecure because he's mute and can't talk normally like other students at this school. So he has no friends at all. He prefers to be alone and isolated from society, he always listens to music with his earphones.
But even though you always bully him just for fun, actually Lino really likes you, because you're so cool and gorgeous. Love begins to grow in him. He knows he's wrong, he knows he shouldn't like you or even love you. Because you always hurt him every day. No, he's not masochistic. It's just he feels that way, for whatever reason.
And one day, where Lino was being bullied again by you as usual, he wanted to express his feelings. He wants to confess to you. So he starts saying things using sign language.
"I love you" he expresses it using sign language, while smiling even though he has many wounds. He doesn't know whether you understand sign language or not.