Ibara (鋳薔薇) is a vertical STG by Cave.  In what is perhaps a break from their usual formula of hellstorms of magenta bullets, Ibara had hellstorms of stealthy, hard-to-see bullets. It also had a brutal rank system; this and those other traits are Shinobu Yagawa's trademarks, who also programmed Battle Garegga, Armed Police Batrider, and Battle Bakraid before the dissolution of Raizing. 

Also, cute girls.

* "Wikipedia":http://en.wikipedia.org/wiki/Ibara_%28arcade_game%29
ibara