Hey thanks so much for playing! This was the first visual novel I made and I unfortunately had a poor grasp of many of the genre's conventions. The features you asked for are not included. However you can adjust the text speed in the options to read through your second playthrough a little faster; hope that helps.
as for the bug you mentioned, We have encountered it before and can send you a fix. Let me know what chapter you were in and roughly what was being said at cutegamesclub@gmail.com and we'll take care of it. Thank you again!