Guess the author decided to work on hentaicontent & probably found success with it. Sad way to end but I can't fault the author if they found something better to do. Thanks for the translating this to completion.
Well, if it ends with "continue to episode 5", but there doesn't seem to be chapter 5, and the author doesn't seem to be willing to continue it, then wouldn't it be better to mark the manga as cancelled instead of completed?