Weird Game: White Time

[Strange stories about rules + no cp + the protagonist is an ordinary person (growth type)] Just when Bai Shi was about to play, an old man in black invited him to participate in the game. "... Me?" Bai Shi pointed at himself, with a look of disbelief on his face, "Yeah." The man nodded with a smile, "I can extend my life~" Bai Shi had a look of disbelief on his face and suddenly put on a smiling face, "Game... Game? I... Am the best at playing games, let's... Start quickly."