ibara
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.