Ugh.... Please help!

I can't find it! I already look on to the list and the tags but still can't find it! So please help me find this shoujo manga... It's a story of a boy who has a crush or unrequited love with his childhood friend named Kyouko-chan. And the boy met a friend who has this power that tells that in the future the boy and Kyouko-chan should be bound to get married and have children because if they didn't, it will be the cause of the destruction of the world. Btw, Kyouko-chan has this long hair and kinda cheerful. So anyone please give me the link if someone knows?? ╥﹏╥