Stray Love Hearts (Shouoto Aya)

It's kind of a fast manga yet slow but the artwork is nice and the idea for the story isn't bad at all. there's also some cool scenes you would save up. it'll make you feel as if your entering the world of Wonderland.
SUMMARY: ( From Mangareader.net)

On the eve of her sixteenth birthday, Kozue Hiyoki is visited in her dreams by a man who steals her heart- literally! Determined to find him and retrieve her stolen heart, Hiyoki enrolls in the S-Hall dormitories of St. Nazareth Academy, but quickly realizes that its residents are not at all like she expected... For starters, they are all guys.