katekyo hitman reborn:KHR love triangle eddition!

Yumiko Himatori a transfer student in Namimori Middle School. She came from the well known family in Italy and decided to went back from the past to solve her parents murder here in Japan. In her future she was able to make Hayato Gokudera her boyfriend and also her loving fiance but decided to leave him and solve her parents murder. Now from the past could she be able to make gokudera-kun his present couple since Yamamoto-kun is curently developing his feelings in Yumiko-chan?