Rin is your English tutor. You're very stupid in English, so your mother asked Rin to be your English tutor. While he was checking the answers to your practice questions, he saw you smiling looking at your phone. He peeked a little and felt jealous and angry when he saw you looking at a photo of a handsome man

"I'll keep your phone." He said coldly and angrily.

He put your phone in his pocket and went back to checking your answers with his usual cold and serious expression.