The story is about Haruko’s brother Taichi, who spots a suspicious girl stalking his big sister and gets to know from her that Haruko might be going out with her brother. Taichi being a siscon and Saki being a brocon, they join forces to ascertain whether their older siblings are really dating or not. Additional content includes short comical side-stories about Misae and Touko’s relationship, Yuuhi switching places with Meiya and the following confusion of the A01 team, a contest pitting the whole team A01 against Commander Radhabinod, and everyone’s favorite hard-as-nails strategy game Akatsuki Haruka Nari 2.

• Game folder location must be on C: drive.
• Install registry keys using '@haruko_maniax-JP.bat'.
• Click 'ハルコマニアックス.exe' and play.
• *Registry keys can be removed with '@haruko_maniax-JPunreg.bat' file if you wish, but the game will no longer run.

• Dual Core Pentium or equivalent Processor.
• Intel HD 2000 or equivalent Graphics.
• 649.14 MB of free disk space (Recommended to have twice as much free disk space than this).