Just got recommended this game, so far I got two errors/bugs from this current version. One is from end of first BunBun conversation at the start of the game, the error can be ignored by clicking ignore two times to end the conversation and carry on. The other one this the first saturday I encounter, in the living room where all the sisters at, before you ask for Lola's singing lessons from Luna, if you click on Lola, you get the scene in the living room, but after you talk to Luna everything is normal again.
===Update===
After play for a while if you buy from Lucy, after that going back to your room soft crashes your game by loading you to the main menu. Something it triggers by going into the room or trying to sleep and end the day, either way the game get stuck if you do not have a save file to reverse that action.