Below is the link to Gokudokun's fan fiction novel.
https://gall.dcinside.com/board/view/...
Our drinking is wrong, too. (1 of 2)
https://gall.dcinside.com/board/view/...
As expected, our drinking is wrong (2/2)
https://gall.dcinside.com/board/view/...
As expected, our drinking in the game is wrong. Trial version