Origami - Manga

Yuna is a special girl. Ever since she was little, she has had unbeatable luck. All the girls in her class even come to her to ask for luck with the boys they like! Although an orphan, Yuna is not sad. She still has her older brother, and together they fight through everything. But one day, Yuna meets this strange attractive boy who demands that she gives the only memento she has of her mother to him...