Well, doesn't he nail it on the head:

Koi wa Ameagari no You ni (Love Is Like After the Rain) is about a teenage girl who falls in love with her 45-year-old manager at the family restaurant where she works part-time. [...] That is, you don't necessarily need to dodge the show if the premise makes you uncomfortable. (Likewise, if you find the premise titillating, expect to be disappointed.)

Precisely why I dropped the manga some 20 or 30 chapters in.