-Take a drink every time a pair of tits is exposed. Take a sip if it's only one of them.
-Take another drink if the girl's clothing is ripped to pieces to achieve this.
-Take a third drink if aforementioned clothing destruction was accidental and probably the result of some random attack gone astray.
-Take a drink whenever someone mentions tits.
-Take another drink if it comes out of nowhere into a scene that wasn't about tits before. (the walrus thing would be a pretty good example)
-Take a drink whenever someone mentions tits in a sentence that would be a non-creepy compliment if it wasn't about tits. (i.e. "Your breasts are so beautiful!/Your breasts give me strength!/I want to live with your breasts forever!" ...Man, this sounds like Yu-Gi-Oh: The Abridged Series.)
-Take a drink whenever the superiority of large breasts is mentioned.
-Take a drink whenever an idiotic scheme for breast enlargement is put into action.
-Take a drink every time a villain tries to rape Mafuyu, Tomo, Hana, Miyuri, Class Rep or whatever new girls they're coming up with this season
-Take a drink every time a hero tries to rape Mafuyu, Tomo, Hana, Miyuri, Class Rep or whatever new girls they're coming up with this season
-Take a drink every time Tomo tries to rape... you get the drill. Sucking her own tits counts.
-Take a drink every time there's tit-sucking.
-Take another drink if the girl being sucked sounds like she's having an orgasm.
-Take a third drink if the tit-sucking involves acrobatics, special effects or new techniques.
-Take a fourth drink if the hero/villain in question unleashes a new attack after aforementioned tit-sucking.
-Take a drink every time Sasha's Russianness is emphasized, usually via borscht.
-Take a drink every time Hana says "Katja-sama".
-Take a drink every time Sasha gropes someone.
-Take a second drink if he also ranks their power.
-Take a drink every time random girls squee over the Qwasers.
-Take a drink every time suspicious white liquid flies out of someone's tits.
-Finally, empty your glass if there's another bestiality scene.
Bonus Round! Take a drink for every derpface you spot.