One D@y

"My best friend, whom I lost touch with five years ago, is now homeless."

Tetsuya Kuroda (30), a young president of a small video company, is walking home late at night.
On his way home, he passes a familiar figure.
It was Ginta Shirai, his best friend who suddenly disappeared five years ago.

Kuroda unexpectedly takes Shirai by the hand and forces him to stay at his house.
[from NovleGame description]