"Similar animation style to this" REALLY doesn't narrow it down since there are literally hundreds of games on this site with visuals created in Honey Select (and hundreds more in its even-more-anime sister program Koikatsu), but I think you might be talking about
Twisted Memories. I've played a few other games about a middle-aged/old guy getting a second chance at youth, but that's the only one where I remember him going back and forth instead of just returning to his younger years and staying there.
Also, next time you have a question like this, there's
a separate board specifically for them. I won't report you, but this
is technically off-topic here.