User blog comment:B214/Talk About What You Want! 3/@comment-16281343-20150228142717

With another look on the quotes, I am now sure that the new short story will be about Rias and Raiser having a match.

"If I have another chance, I will not lose again"

- Himejima Akeno


 * Talking about her defeat against Yubelluna.

"At that time, I wasn't able to stand and fight for Buchou"

- Gasper Vladi


 * Rating game happened in v2, Gasper was released on v4.

"If you have two [Rook], the tactics would change, right?"

- Rossweisse


 * Rating game happened in v2, Rose was added to Rias' group on v7.

"Come on, Hyoudou Issei. Let me see your strength right now"

- ？？？？ ・？？？？？？-> ライザー・フェニックス -> Raiser Phenex