"La Serotonina," a short suite of three tangos for violin and harp, was written for the ensemble BloomingDuo (Ji-Woon Kim and Fanfen Tai). Each piece is dedicated to a different person, and each uses a motto derived from the dedicatee's name. The first piece, a tango, is dedicated to violinist Ji-Woon Kim. The second, a vals, is dedicated to the esteemed harpist Suzanne McDonald. The third is a milonga, dedicated to harpist Fanfen Tai. The title comes from a monthly milonga (tango dance gathering) of the same name hosted by some dear friends of ours. 'La serotonina' is the Spanish word for 'serotonin,' a hormone which gives us feelings of balance, happiness and well-being.