カードファイト!! ヴァンガード外伝 イフ-if-
Cardfight!! Vanguard Gaiden: If
TV PG-13 HD Sub 25 25 eps
The series will explore an alternate universe to the main series, and will focus on Kouji Ibuki, an antagonist in the Cardfight!! Vanguard Movie: Neon Messiah, and Suiko Tatsunagi. (Source: ANN, edited)