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In Sailor Moon SuperS episode 17, Shingo has a crush on Ami. After being tasks by Usagi to chase off guys they didn't like much (due to Mamaru being busy) to his resentment he takes a liking to Ami.
They go out on an inflatable boat together. Tiger's Eye attacks throwing Shingo into the ocean. Ami dives in and saves him and give him mouth-to-moth resuscitation.
Later Tiger's Eye attacks Ami upset that she didn't like him. Shingo tries to defend her but Tiger's Eye easy knocks him out. After Tiger's Eye is driven away and they recover Ami and Shingo are watching fireworks together.
It is a less common pairing since it was only featured in one episode of the classic anime, which would be Shingo's last appearance. It is not even as popular as Shingo and Hotaru (who ever actually meet). It does have some fans though.