Going to the spot where it requires a bomb to blow up the rocks without having a bomb causes character to be locked on that spot (after triggering the scene where the game tells you that you need either a tool or a unit to open the path, your location on the map is shifted one spot towards the right).
Also, I'm still trying to figure out how to trigger the nsfw scenes? One of the 3 initial characters (the smaller guy) had a "finisher" option with the bee enemies, I didn't know how I triggered that, but after the first "boss" he is no longer in the party, and the newly recruited members cannot seem to trigger any new scenes