Missouri instrumentalists Sisters Of. have premiered their new single, “Adulescentia” , at Heavy Blog is Heavy. The new six-minute composition follows their 2015 full-length, The Serpent, The Angel and The Adversary, and serves as a preview to their upcoming album which the band is in the midst of writing. The track frequently changes mood and style throughout. Expressive post-rock, saccharine pop melodies and monolithic post/sludge metal can all be heard on this new tune. Spotlights‘ Mario Quintero plays keys on the track as well. Check out the single now.