ore_no_imouto_wo_sekai_ichi_no_breaker_ni_suru_houhou
Ore no Imouto wo Sekai Ichi no Breaker ni suru Houhou (俺の妹を世界一の魔砲神姫にする方法) is a light novel series written by Takanori Shindou (進藤尚典), and illustrated by Ichikura.
(According to the furigana, "魔砲神姫" reads "ブレイカー".)
External links
- "Official website"
http://fantasiataisho-sp.com/details/sister/(Dead link)