User blog comment:B214/Don't ask about season 4/@comment-27083298-20161022114732/@comment-26345952-20161022171524

@Crimson it's Vol 9 and 10. Those are two of the volumes I keep close to heart amongs others.

I want everything about it animated: Kunou, Yasaka, LeFay, Cao Cao, Siegfreed, Heracles, Jane, McGreoge, Rosseweise being a victim to Dress Break (though the shorts kind of git that), Leviathan in Yukata (I think that is what it is), the hotel scenes, Saji in Dragon King Mode and Vritra for that matter, First Sun Wukong, Yu Long, Illegal Move Triaina, Ravel in school uniform, Ravel and Koneko rivalry, the Sauna scene, Issei letting go of his trauma, Every fight in the Rias vs. Sairaorg Rating Game, Regulus, Shirone mode 2, the Holy Dragon Troopers, the Emperor of Demonic Swords Gram, Reguluss Balance Breaker, Cradinal Crimson Promotion, Issei vs. Sairaorg, and Issei confessing to Rias his feelings.

Basically, everything.