For people who read the Light Novels.
- Drink one whenever Issei does something perverted, especially if he mentions anything about breasts (WARNING: YOU WILL NOT MAKE IT TO THE END OF VOLUME 1). Drink twice if it's not him.
- Drink one whenever Issei gets a shiny new power up thanks to Rias' breasts.
- Drink one whenever Irina's wings flicker from angel to fallen angel.
- Drink one whenever the church trio (Asia, Xenovia, and Irina) pray to God. Take another shot if either of the first two get a headache as a result.
- Drink one whenever Akeno teases Issei.
- Drink one whenever Issei makes a First-Person Smartass comment. Drink twice if it's Kiba or Azazel. Or Fenrir.
- Drink one whenever anyone kills a moment. Drink twice if it's Ophis.
- Drink one whenever Koneko makes a snarky comment.
- Drink one whenever Issei starts ranting about how much of a loser he is. Drink twice if at least one of his haremettes tries to comfort him. Finish your bottle during the scene where Akeno, Asia, and Koneko console him over his trauma with Raynare in Volume 10/Season 4.
- Drink one whenever Issei gets either Marshmallow Hell or a Lap Pillow.
- Down one bottle whenever either Ddraig or Albion get into another one of their Heroic BSoD moments.
