Aquanaut Campus

Main character is a young professor who teaches marine archaeology at University. His study is laughable and he has only one student attending, so he is given ultimatum - either he reaches some breakthrough by the end of the year or it's the end of this seminar.

On vacations protagonist with his student Nagi Aomi go to the excavation site at Lisbon Island where professor was born and raised. Will he succeed with excavations within just a week? And will he be able to find love with old acquaintances or his student there?

[From vndbreview]