Softball Circle "Honwaka"

As a freshman in college, the protagonist joins a softball team. His reason for joining it is that they do not seem to take softball too seriously, and the guy to girl ratio is in his favor. He also thinks the people in it are nice, though soon he changes his opinion to them being too nice and un-accepting of any differing views. He soon finds out that the group was in reality a group that promoted natural foods made by one specific corporation, and whose owner's daughter occasionally visits them.