For now this is at a very low level, obviously it is starting, based on this I conclude:
Art: I give it an 8, it's not bad but it could be improved a bit.
Gameplay: it's a typical sandbox, so it can be very repetitive, the dev should take care of this aspect since normally this affects a lot.
Sexual scenes: for now I think there are some but I saw them due to repetition, however from the images they look good.
Story: Not much to tell, a trainer/dating sim, but it could be very promising.
For now it seems very promising, most of the criticism of the game is focused on the language (which should be improved if you plan to focus on the English-speaking market), however it can be a very good thing, a good trainer / dating sim was already needed of dragon ball (although some already exist).
Good luck to the dev.