As far as I could understand, it’s the usual “Heroes vs. Demons” kind of story, in which can end with bad endings for the.. female companions? For your sister? Since in the beginning our protagonist gets called “Onii-chan” – unless it’s not the true, but another “kind of”. But either way, is that kind of game that you can rescue and then bad things happens after a set amount of “time” if you don’t hurry, I suppose.

Guess that some NTR is in it.
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I mean, if someone have a better overview, feel free to share it. Having google as helper.. it’s not that great.​

• Extract to desired location.
• Click on "executable_name.exe" to start playing.

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