The beneficial effects of combined psychosocial and pharmacological treatments for bipolar disorder have been widely documented. However, little research has specifically looked at bipolar II disorder (BP-II), despite it being the most common variant. Methods: This study used a matched-pairs two-group pretest-posttest design to compare the effectiveness of the 10-session weekly "BalancingMySwing" (BMS) program with treatment as usual in a Han Chinese cohort with bipolar II disorder. Twenty-four participants from a medical center in southern Taiwan with a DSM-IV diagnosis of BP-II were purposively recruited and divided into two matched-pair groups for treatment feasibility. Primary outcome indicators were medication adherence and mood symptoms, which were assessed at baseline and posttreatment. Medication adherence was assessed using the self-reported Medication Adherence Rating Scale (MARS). Mood symptoms were assessed by a blinded rater using the 11-item Young Mania Rating Scale (YMRS) and 17-item Hamilton Depression Rating Scale (HDRS).