Nonomura Byouin no Hitobito (Visual Novel)

The principal owner of the Nonomura Hospital has died and private investigator Kaibara must investigate. His nose smells something fishy, however, and his instincts are running amock amidst all the beautiful nurses in the hospital's employ. The answer is right in front of him. And all he needs to do for himself and the case is to feel his way through every girl's panties...

[Taken from ANN]