I would like to research these "not shit fap material" games you speak of
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Completed game. Fond memories of this one. First visual novel I’ve played in my life. Very traditional visual novel feel; just read texts and select the occasional choices. Option to date 5 girls, with bad ends for each but no harem ends. You basically play as a student who had to transfer schools. The girls you can date are each physically disabled, but the emphasis of the game is on their distinct characters and personalities that transcend those disabilities.
•Fruits of Grisaia
Completed game. Another classic visual novel, 50+ hours in content. Beware dark themes though, including parental abuse and cannibalism (no, these themes aren't there for some fetish, they're present because of the storyline. Also those scenes aren't sexy at all, they are made to make you genuinely sad).
About a student with a dark, cryptic past who attends a boarding school in rural Japan. Option to date 5 girls, no harem endings, ton of good writing. Has two sequels: Labyrinth of Grisaia (strangely enough, SFW but has non-canon bonus smut scenarios) and Eden of Grisaia (NSFW, you can finally bang multiple girls). Tons of spin-offs and spiritual sequels as well.
•LiL
Incomplete game, funded on Patreon, dev usually updates twice a month. Play the NSFW version, not the SFW Patreon version.