Koishi: "March 14th is Pi Day, so would you like to see my lower breast?" [tn: Pi (pai) is the second syllable of the Japanese slang term for breasts (oppai).]
"Y- yeah!"
Koishi: "You really want to see it?"
"Definitely!"
Koishi: "But you can't♪ Today's already the 15th."
"But that's..."
Koishi: "Ahaha, you wanted to see Koishi's breasts that badly, huh? Onii-chan's a pervert! Pervert, pervert! (*giggling*)