The author of Pippa's favourite incest manga, "Oreimo: My Litter Sister Can't Be This Cute" is publishing another manga starting next year.
Because I know you all love Pippa's manga recommendations, here's a synopsis for you: "Despite being handsome, smart, athletic, and rich with beautiful sisters, the MC has never attracted any girls. Determined to start anew in high school, he wakes up one day as a cute girl and excitedly shares the news with his popular younger sister, unaware that this transformation has also affected her."
Looks like more of the same as Oreimo, just with a genderbent MC.