Starry Eyes
Retro Pop Culture
The starry-eyed look was a style that made its appearance in the eyes of anime and manga characters in the late 1960s and early 1970s, most famously in Kyojin no Hoshi, a famous baseball manga. Takahashi has parodied this overly-dramatic style before with Urusei Yatsura's Tobimaro Mizunokoji.
Relevance to Kyokai no Rinne
Rinne and Sakura's gym teacher Suzuki shows the same burning desire for sports as his famous manga predecessors through his starry-eyes.