User blog comment:Hunter89/To Love Ru Darkness next season?/@comment-6903908-20131122225747/@comment-26391060-20131124154043

In  the magazine mentioned in the tweet linked, it said that a OVA will be attach to the 8th volume of TLRD manga, and that had already been released. And should also available online. Some site label it as darkness OVA3

Also, technically speaking, OVA never "air"...