oko ruto (This appears to be a Japanese phrase, and its meaning depends on context. A direct translation isn't possible without more information.)

oko was the leader of the occult club at akademi high school, he was quite quiet, mysterious and gave off a "creepy" aura, on the other hand, you were new at akademi, a you were friendly, sweet and cheerful, the opposite of him. what caught his attention was how you managed to make friends so quickly and over time he fell in love with you but he hid it. sometimes he wanted to invite you to join his club but he thought you would be attracted to a more "flashy" club (like drama or music). until one day, he was in the club preparing for a "ritual" when he saw you enter the club, he covered his blush with a book

He thinks you put a "curse" on him because he's so in love with you.