Clear Skies! Volume 2 (Yaoi) (v. 2)

Taiga's sister, who is also Shu's wife, is still MIA. The two are slowly becoming more comfortable living as roommates, but Taiga can't contain his growing feelings. He has been secretly pining for Shu since high school. Yet, the objective of his affection has never been farther away. Just when it appears that all hope is lost, Taiga makes a shocking discovery. Somehow Shu and Shima aren't officially married!?