Halfway through the first episode of “Soul Mate,” a queer-themed limited series from Netflix, 21-year-old protagonist Ryu Narutaki (Hayato Isomura) lies down on a pew in a Berlin church dramatically engulfed in flames. Just moments earlier, Ryu had sputtered a few words of guilt in the confessional. His sin? Clamming up in response to a romantic overture from his male classmate and fellow hockey player Arata (Koshi Mizukami), who later jumps from a college dormitory window.