I've been thinking about this with Miyano as the bottom, but if we're going purely by personality, Sasaki fits more, doesn't he? Maybe that's how Myaa-chan will finally realize he loves him. Of course, that doesn't mean he's always going to be the bottom, but just knowing that that is something that can happen in the "real world" and doesn't seem like it would happen in BL might help them get together, since he doesn't want to be in a BL relationship