3 would be my first guess, at the very beggining of the game their original agreement was for the MC to stay in Sunshine Bay for 3 months, and chapter 1 represented the first month.So with the game's last update bringing it up to 1.0.0, but with plans for a Chapter 2, do we know how many chapters are planned in total?
Still who knows, given Dots difficulties with "ending" things(coff... DMD never ends) he might keep going beyond the original agreement.