High School DxD BorN Episode 3: Cat and Dragon!
Episode 3 of 12 of High School DxD BorN, aired April 18, 2015, 25 minutes. Available with English subtitles and dub where released.
Episode summary
Koneko's sister Kuroka has appeared to take her sister away from Rias Gremory. Issei and Rias chase after her to stop that from happening. At the same time, a figure who objects to these alliances between mythologies appears at the great gathering.