The third and fourth combined 2017 issue of Young Jump magazine has announced that the 21st volume of Terra Formars, which will go on sale on May 19, 2017, will bundle an OVA. The episode, titled "Born to be Guardian Tatakau Riyuu," will be based on the Earth arc that begins to take place in volume 18.
Viz Media licensed both TV anime seasons and has also licensed the manga under its Signature imprint for North American release. The 15th volume was released in November.