Aina Kuronuma

Оригінальне ім’я: 黒沼あいな

Kuronuma Aina is a female student in Sakamoto's class who falls for him. She is very popular among boys but has no interest for anyone else except Sakamoto, which makes her disliked by other girls. She charms the boys to do her bidding by making them fall in love with her through 'love lessons', which turned out to be totally invalid to Sakamoto.