Satō Matsuzaka

and her only canonical love interest is the girl Shio. And although the sexual part of their relationship is still questionable, the manga repeatedly emphasizes the romantic basis of Sato's feelings. In the past, she did date several boys to which she didn't show any romantic interest for them. Furthermore, in Episode 5, she kisses Sumire. In the last episode, she dies but there also contains a possible hint that Shio could adopt Sato’s way of life and her view on love, after Sato is reborn with her.