I have a few suggestions.
1.) Insect Angels (怪虫戦隊インセクトエンジェルズ) - An srpg where you control a team of monster girls. They start off "good" but pretty quickly fall unless you play really carefully. Then the game turns into capturing and brainwashing the other two teams. The main story is very sparse, most of the good stuff is short vignettes you get when two hero characters end on adjacent spaces. With 3 stages of corruption for the main heroes, and corrupted/uncorrupted versions of the other 6, there's a lot of special conditions and many unique combinations for dialogue. I think 2? H scenes
2.) R/R-全宇宙グルメ化計画- - a standard turn based rpg. You capture and turn 3 DBZ members over the course of the game. Linear story and very easy if you level up. Most H scenes of the three listed here
3.) Aldo Senki (アルド戦記) - another SRPG, not made in rpgmaker. But it's 50 chapters at the moment, with more due out this year possibly. I haven't played it legitimately so I can't comment on difficulty, but there's a cheat sword that makes it easy to breeze through. No machine translation since I can't find any text hooks that work, but still my favorite corruption game to date. Mostly betrayal and hidden agendas, where corrupted soldiers stay in the good army and infiltrate. 0 H scenes
