He does hint at something like an epilogue for each of the stories. A sequel to the game in general would be tricky unless it lets you select a route or uses your save files from this one. It hurt but I did all possible ends for Harold.
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I hope the epilogue takes the story forward beyond those 35 days. I keep hoping for a gay romance VN that lets you fall in love, overcome relationship obstacles, THEN start a family, adopt a kid (or conceive one using IVF surrogate), grow old together by the end of the route. Sadly, all games so far only focus on the conflict & courting and never go beyond it. Know of any games like that, by any chance? :(