User blog comment:Crimson and Darkness/Volume 25 discussion blog/@comment-110.54.203.238-20180518132834

i read this in zx blog in issei childhood his grandfather said “Oppai contain the ultimate power. That’s why, when robots and space battleships attack, they must gather the power of oppai in order to attack. Oppai beam! Oppai wave cannon! Like that. In this way, regardless of whether you’ve built a robot or a space battleship, you’ll be able to defeat jii-chan’s ero figure, Ise.” its similar to chichigami said to issei in spoiler in vol 25