Not just that but I think a bit of more build up with relationship and more action like take the girl to the town or having a few minor characters to interact with would make your game better in the long term and attract more supports, you can taking other trainer games on this site to use as reference sources to help with. The training event should have a bit more variants too but I think it would be best to have a few other option like hang around the house, taking bath together, playing some kind of games, some more outfit option or a shop to buy something as a reward for the girl,.... Maybe even feeding her and order her to work around the house can be a nice way to train and increase the relationship or submission point