It seems Spontania has definitely bet on colaborations to make headlines with their singles... After JUJU, Yuna Ito and Seiko Hashimoto, they will duet with Sotte Bosse.
Spontania will release their new single, which is still untitled, on July 29th 2009.

The A-side is said to be a fresh uptempo summer song, co-produced by Hiroshi Nakamura of Sotte Bosse. We can suppose Cana, the other member, will also get involved in the duet and sing. By the way, a new Sotte Bosse album will be out on May 27th.