水夏 ~SUIKAおー・157章~

A 'Learning Software' of sorts officially endorsed by the Japanese government aiming to educate people on how to avoid food poisoning, and specifically the 'Escherichia coli O157:H7' bacteria strain, a leading cause of foodborne illness.

[From Blue Mist]

It was released simultaneously with the all ages version of the original Suika and features chibi versions of the game's characters in an ADV/Quiz game consisting of four different chapters, each one with it's own individual story including tasks like finding a way to cure an infection or to master the art of cooking.