Love, Sex and Second Base also has a fair amount of content and (I believe) is pretty much done except for DLC material that they are working on. Not going to be your cup or tea if you just got to have animations though.
LSSB is decent but it's inconsistent with the art quality and gameplay grind is worse if you don't cheat. At the very least when I last played it eons ago, it was decent and there is a whole lot of content in it so agreed there. It's a quantity over quality game
Summertime Saga's biggest plus is the artist has stuck by the game all the way, it's his creation, and he's been making the assets of the game from start to finish. That has helped with keeping the high quality. The downside is everything else. Other devs who write or code their games but hire artists can do everything right but visually or artistically don't know what they're doing
edit: sidenote this is what I respect about a lot of japanese made 2d adult games, they actually care about the art
