The story from Anime News Network
http://www.animenewsnetwork.com/news/2012-04-01/animeanime.jp/to-love-ru-darkness-anime-to-run-on-tv
The first bimonthly issue of Shueisha's Jump SQ.19 magazine is announcing on Thursday that the limited edition of the fifth To Love-Ru -Trouble- Darkness manga volume will bundle an anime DVD. The DVD will run about 24 minutes long and contain three episodes. The limited edition bundle will ship on August 17.
The anime shorts will adapt three bonus extra chapters — Chapter 0 "Prologue ~Project Shidō" (Prologue: Project Launch), "Pollen plan ~Kiken na Imōto Jōji~" (Pollen plan: Dangerous Sister Affair), "Body touch? ~Nyan-derful Life~" — from the manga which center around the characters Momo, Mikan, and Haruna, respectively.
The manga is also inspiring a television anime. Atsushi Ootsuki is returning from the earlier To Love-Ru television anime to direct at Xebec, and To Love-Ru veteran Yuichi Ouka is also designing the characters.
The story at Crunchyroll
http://www.crunchyroll.com/anime-news/2012/04/17/to-love-ru-darkness-anime-to-be-both-tv-series-and-oad
Greg Lanson
April 17, 2012 9:39am PDT
Further adding fuel to the "How are they going to air it?" fire, the 19th issue of Jump Square, on sale 4/19, reveals that the previously announced anime adaptation of To Love-Ru Darkness is actually going to be both a TV series and an OAD.
The OAD (original anime DVD) will be released with the limited edition 5th volume of the manga which goes on sale on August 17th for 3610 yen (~$45 USD). The DVD will contain three mini-episodes totaling about 24 minutes: Episode 0 "Prologue ~Project Begins" and two extra stories "Pollen Plan ~Dangerous Sister Love Affair~" and "Body Touch? ~Nyanderful Life~."
There will also be a TV series which will air sometime after the OAD is released, but is not specifically dated. Both the OAD and the TV series will be animated by XEBEC with Motto To Love-Ru staff Atsushi Ootsuki directing and Yuuichi Oka doing character designs.
Source: To Love-Ru Love (NSFW) via Yaraon!