東方星蓮船 Undefined Fantastic Object/ Touhou Seirensen: Undefined Fantastic Object

The 12th game in the Touhou Project.

The story is about a strange flying object that appears in the skies of Gensokyo during the early springtime. The player character will, for whatever reason their shot type description says, launch off into the sky to unravel its mysteries, plunder its treasure, and generally get rid of youkai.