Suikyo no Shizuku - Seiin Shimai

One Day, The Lead Character (You) Gets A Letter From Your Former Teacher Disappeared Over Decades Ago... In The Letter The Teacher Says That He Needs Your Help. You Rush To His Place With The Aid of The Address On The Letter, And Finds A Mysterious Mansion On The Edge of Cliff... Yes, This Is The Start of The Game... Over-The-Hill Teacher Receives A Letter From His Ex-Students, Pleading Him To Help Them. The Teacher Arrives At The Address From The Letter Only To Find A Suspicious Mansion. Soon Enough, He Passes Out After Touching An Ancient Artifact. He Now Knows That The Mansion Holds Secrets Within Its Walls.