Bus from Sapporo to Noboribetsu

Hi, may I know if there is any bus that goes from Sapporo to Noboribetsu early in the morning and a return bus from Noboribetsu to Sapporo in the evening?

Thank you very much.

There is one direct bus between Sapporo and Noboribetsu Onsen, but it seems targeted at people who stay overnight at Noboribetsu Onsen. It leaves Sapporo in the early afternoon and returns to Sapporo in the morning:
http://donanbus.co.jp/citybus/wp-content/uploads/sites/5/2013/11/4%E7%...

There are multiple buses between Sapporo and Muroran that stop in the Noboribetsu's city center (not the hot spring town center!) along the way:
http://www.chuo-bus.co.jp/highway/index.cgi?ope=det&n=21&o=1&t=149

You would have to take a second bus to travel between Noboribetsu city center and hot spring town.

It is also explained here:
http://www.japan-guide.com/e/e6753.html?aFROM=2163_6750