Are you a fan of the Grisaia trilogy? Fruit of Grisaia just recently launched on Steam and definitely increased the English-language following of the franchise.
In any case, now both Part 1 and Part 2 of Idol Magical Girl Chiru Chiru Michiru are available on Steam. Each part is comprised of a handful of episodes which focus on none other than Grisaia’s Michiru (which some define as the “best” character). If you’re in agreement then these are definitely the games for you.