Heartstuck is lesbians with a chance of homosexuals. Or to be more precise, an Interactive Comic in an Alternate Universe of Homestuck where all the trolls are human and they go to different all-boy and all-girl schools. One stars Kanaya Maryam, who has just applied for the academy and the other presumably uses Gamzee Makara as the protagonist. Adding to this, it all takes place in a Dating Sim, with the constructs and a saving system and everything. Can be read here, but you may want to read the mirror to avoid incredibly large amounts of off-topic discussions.