There's something that can innovate the subgenre of romantic comedies that involve sisters as the main romantic interests:

1. Go bonkers with the number of sisters, make it 12 sisters as minimum
2. Seven Brides for Seven Brothers but Anime style
3. Go the harem route, say polygamy is legal in Japan because of the birth rates
4. A good twin sisters anime
5. Conjoined twins

@hfaust 6. gay incest

@why

@hfaust hey we already opened the door to sin with 3 im just following along

@why Maybe it's alternative history where Japan is a Muslim country

@hfaust @why at the rate we're going we don't need alternative history for that