Kirai ni Narimasu, Sayama-kun!

In some way, the student council president Ayukawa Wakana ends up confessing her love to the vice-president Sayama Iku, but she gets immediately rejected, though, Sayama tells her he could "date her" as long as Wakana is able to hate him... why did he tell her that? Can she do it? Includes 3 extra c