From Thriftiness Comes Love!?

Finally the Okura brothers were reunited and decide to help Chisato fulfill all of her motherly duties. They completed the first two, but no one wanted to do the third... but what if it will be the reason for them to have 10 million yen? Mean while, Sho needs money urgently... and for some reasons the 10 million was stolen. Did Sho take it? What was the money for? Will they complete the third task?