2dcg, rpgm, male main: From Frontier (Doubles*Core).
https://f95zone.to/threads/from-frontier-final-doubles-core.133812/
10 girls, which is one too many if you want to play (in battles) each one full-time/ fully skilled in 3 runs. Ecchi is mostly through advancing relationship, which means you can time it to whenever you feel like. Well, mostly, since girls unlock skills when relationship advances, then again those skills are often not needed.
Writing is odd. Mostly competent, even surprising, other (few) times very stupid Japanese trope-ish.
tip: do not level up the guy too much. If you do, enemies become sorta worthless, meaning you have a hard time leveling up the girls, which you need because bosses. Leveling up the guy too little means fierce enemies, though.
Not a harem, towards the end you shall choose 1 girl. Just save game, choose this one, then after girl-ending, reload and choose other one. All endings together complete the story.
pregnancy/ kids only as epilogues for some endings (Mana, Gera, Suzume, maybe another one)