Need more information than that. What path were you on. If you got the bad result to the previous day (i.e. Yuu and Sho neither get intimate nor make out and instead Shoichi pushes things too far), then you're on the path that hasn't been updated. It showing a transition instead of a game end screen is a bug.
If you're on one of the paths that DID get updated (either making out or sex), then post a screenshot of the last line of text you see before you try to procede and the game boots to the title screen.