ho ho this one i just saw on onemanga that they just added....and at the same time...i was looking for a new list =P....so i searched for romance and wadda yah know...this was one of them ^_^
so i took a look....its an ongoing series...only 14 chapters right now (but it was just added yesterday) and so far....its pretty good....i give it 4.5/5 ^_^
heres the description:
Kanoko Ooba is a 16 year old innocent girl currently attending high school. Her family owns a traditional Japanese sweets shop since the Meiji period. When her family's company becomes bankrupt, a mysterious stranger offers to pay their family's debt, in exchange, he wishes to marry one of the daughters of the Ooba family. When Kanoko's two elder sisters refused to be married, Kanoko volunteered herself in hopes of saving her family.
http://en.wikipedia.org/wiki/Billion_Girlhope u enjoy it ^_^