User blog comment:Piyush Banerjee/Shin DxD 2 discussion/@comment-92.7.178.103-20181225122417/@comment-2208155-20181226185401

So.. That happened with Sona and Serafall cosplaying... With Mil-Tan showing his power.

I thought that this was from that volume that Issei trained with all Sona Peerage except Bennia and Loup and I think that Sona, Saji and Tsubaki..